JP3568578B2 - Thiocyanate compound derivative having yonone skeleton and fungicide using the same - Google Patents
Thiocyanate compound derivative having yonone skeleton and fungicide using the same Download PDFInfo
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- JP3568578B2 JP3568578B2 JP10738894A JP10738894A JP3568578B2 JP 3568578 B2 JP3568578 B2 JP 3568578B2 JP 10738894 A JP10738894 A JP 10738894A JP 10738894 A JP10738894 A JP 10738894A JP 3568578 B2 JP3568578 B2 JP 3568578B2
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C403/00—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone
- C07C403/18—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by nitrogen atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated
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Description
【0001】
【産業上の利用分野】
本発明は、殺菌効果に優れる新規なヨノン骨格を有するチオシアナート化合物並びにそれらを含有する殺菌剤に関する。
【0002】
【従来の技術】
香辛料に含まれるテルペノイドは古くから微生物に対して抗菌作用があることが知られていた。近年、植物からテルペノイドを分離精製する技術が高まり、多数のテルペノイドが天然物からの抽出により、または合成によって製造され、食品添加物として使用されている。
【0003】
【発明が解決しようとする課題】
現在、使用されている主なテルペノイドの抗菌活性を表1に示す。
【表1】
いずれも食品添加剤として使用されているため、細菌に対する抗菌効果が主目的である。
また、本発明が提供しようとするようなヨノン骨格を有するチオシアナート化合物誘導体及びその抗菌活性についての報告はない。
【0004】
本発明の目的は、細菌のみならず糸状菌を含めて広範囲の微生物に抗菌活性を有する生理活性化合物を見い出すことにある。
さらに本発明の目的は、これらの化合物を使用し、低濃度で広範囲の微生物に対して有効で、さまざまな用途に使用できる殺菌剤を提供することにある。
【0005】
【課題を解決するための手段】
前記目的を達成するため、本発明によれば、下記化3の一般式(1)で表わされるヨノン骨格を有するチオシアナート化合物誘導体、すなわち、4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナート(以下、本発明化合物Aと略称することもある)及び4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナート(以下、本発明化合物Bと略称することもある)が提供される。
【化3】
さらに本発明によれば、上記一般式(1)で表わされる本発明化合物A及び/又はBを有効成分とする殺菌剤も提供される。
【0006】
【発明の作用及び態様】
本発明者らは、種々のテルペノイドを出発物質として各種化合物を合成し、各種微生物に対する抗菌活性を調査した結果、ヨノン骨格を有するチオシアナート化合物誘導体が細菌のみならず糸状菌を含めて広範囲の微生物に対して優れた抗菌活性を有することを見い出し、本発明を完成するに至ったものである。
上記本発明化合物は、低濃度で広範囲の微生物に対して有効であり、殺菌剤、消毒薬などとして種々の用途に使用できる。また、本発明化合物は、所望により塗膜形成剤、保湿剤、pH調整剤、防錆剤、乳化剤、分散剤、展着剤、安定剤、溶剤、酸化防止剤、噴射剤、揮散調整剤などを添加して、油剤、乳剤、水和剤、噴霧剤、エアゾール剤、燻煙剤、塗布剤、電気蒸散剤、粉剤、粒剤などの形態で使用することができる。
【0007】
以下、本発明化合物の合成方法及び各種効力試験を示して本発明についてさらに具体的に説明する。
合成方法:
まず、本発明に係るヨノン骨格を有するチオシアナート化合物誘導体の一般的な合成方法について概説すると、下記化4の反応式(2)に示すように、まず、出発物質のα−ヨノン(a)のオキシム化(b)を行い、次いでオキシムの還元によって対応するアミン(c)を得、これにチオシアン酸クロロメチルを反応させることによって本発明化合物A(4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナート)が得られる。
【化4】
【0008】
一方、出発物質としてβ−ヨノン(a′)を用いると、それに対応して下記化5の反応式(3)に示すように、上記α−ヨノンを用いた場合と同様にオキシム(b′)及びアミン(c′)を経て本発明化合物B(4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナート)が得られる。
【化5】
なお、本発明化合物の合成が前記合成経路に限定されるものでないことは勿論である。
【0009】
【実施例】
以下、前記本発明化合物A及びBの具体的な合成例を示す。
【0010】
実施例1(本発明化合物Aの合成例)
前記反応式(2)に示す合成経路により、以下の手順に従って本発明化合物Aを合成した。
(a)試料の調製:
α−ヨノン(a)は市販品(和光純薬工業(株)製)を使用した。その物性は下記のとおりである。
沸点:130.0℃/13mmHg、密度d=0.9298(g/ml)、
屈折率n=1.5041、GLC純度:95%
分析方法:
入手した反応油は、必要に応じて蒸留、あるいはオープンカラムクロマトグラフィー(充填剤:和光純薬工業(株)製、ワコーゲルC−200、φ18mm×300mm)で分取し、精製した。
単離精製した物質の構造決定には、IR(日本分光工業(株)製、IR−810型)及び 1H−NMR(日本電子工業(株)製、JMN−MN−100型)を用い、そのスペクトルデータより確認した。その結果を表2に示す。
【表2】
【0011】
(b)4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−オン−オキシムの合成:
攪拌機及び還流冷却器を備えた100mlの四つ口フラスコで、ヒドロキシルアミン塩酸塩2g(0.029モル)を10mlの水に溶解し、これに1規定NaOH 20mlとα−ヨノン(a)1g(0.005モル)を加えた不均一系混合溶液に、均一になるまでエタノールを加え、3時間加熱還流した。反応終了後、エーテルで抽出し、橙色の粘性液体4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−オン−オキシム(b)を収率85.5%で得た。この反応生成物のIR及び 1H−NMRスペクトルデータを表3に示す。
【表3】
【0012】
(c)4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−イル−アミンの合成:
攪拌機、還流冷却器、及び滴下ロートを備えた100mlの四つ口フラスコにLiAlH4 0.4g(0.0108モル)を取り冷却した後、無水エーテル10mlに懸濁し、内温4℃以下に保ちながら前記(b)4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−オン−オキシム1.0g(0.0048モル)と無水エーテル5mlの混合液を1時間かけて滴下した。滴下終了後、油浴中(35〜40℃)で4時間加熱還流を行った。反応終了後、氷冷下、リチウムを分解後、エーテルで抽出し、飽和塩化ナトリウム水溶液で中性になるまで洗浄し、乾燥後、溶媒の留去を行い、4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−イル−アミン(c)を収率85.2%で得た。この反応生成物のIR及び 1H−NMRスペクトルデータを表4に示す。
【表4】
【0013】
(d)ヨノン骨格を有するチオシアナート化合物誘導体(A)の4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−イル−アミン(c)とチオシアン酸クロロメチルとの縮合反応による合成:
攪拌機、還流冷却器、及び滴下ロートを備えた50mlの四つ口フラスコに、4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−イル−アミン(c)0.5g(0.0026モル)とトリエチルアミン0.52g(0.0026×2モル)を取り、室温で、チオシアン酸クロロメチル0.42g(0.0026mol)とジメチルスルホキシド1mlの混合液を30分かけて滴下した後、35分間攪拌した。反応終了後、酢酸エチルで抽出し、飽和食塩水で中性になるまで水洗した後、Na2 SO4 で乾燥し、回収を行なった。得られた粗反応油を、カラムクロマトグラフィー(展開溶媒=ヘキサン:エーテル=9:1)で分離・精製し、4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナート(A)を収率32.3%で得た。この反応生成物のIR及び 1H−NMRスペクトルデータを表5に示す。
【表5】
【0014】
実施例2(本発明化合物Bの合成例)
前記反応式(3)に示す合成経路により、以下の手順に従って本発明化合物Bを合成した。
(a′)試料の調製:
β−ヨノン(a′)は市販品(東京化成(株)製)を使用した。その物性は下記のとおりである。
C13H20O=192.30、
密度d=0.95g/ml、
沸点:140℃/16mmHg
分析方法:
入手した反応油は、オープンカラムクロマトグラフィー(充填剤:シリカゲル60,230〜400メッシュ)を用いて単離、精製した。
精製した物質は、IR(日本分光工業(株)製、IR−810型)及び 1H−NMR(日本電子工業(株)製、JNM−FX60Q)を用いて、そのスペクトルデータより構造の決定及び確認を行った。その結果をそれぞれ表6及び表7に示す。
【表6】
【0015】
【表7】
【0016】
(b′)4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−オン−オキシムの合成:
攪拌機及び還流冷却器を備えた100mlの四つ口フラスコに、4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−オン(a′)1.00g(0.0052モル)、8mlの水に溶解させたヒドロキシルアミン塩酸塩1.81g(0.0052×5.0モル)及び15mlの1N−NaOHを入れ、この混合物が均一になるまでエタノールを加え、70〜80℃で24時間攪拌した。粗反応油を、エーテルを用いて抽出を行い、中性になるまで飽和食塩水で水洗した後、Na2 SO4 で乾燥し回収した。溶媒を留去し、粗反応油をカラムクロマトグラフィー(展開溶媒=ヘキサン:エーテル=96:4)を用いて分離・精製し、橙色の粘性液体4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−オン−オキシム(b′)を、収率52.32%(収量=0.56g)で得た。この反応生成物のIR及び 1H−NMRスペクトルデータをそれぞれ表8及び表9に示す。
【表8】
【0017】
【表9】
【0018】
(c′)4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−イル−アミンの合成:
攪拌機、還流冷却管、及び滴下ロートを備えた50mlの四つ口フラスコに、LiAlH4 0.23g(0.0048×1.3モル)を入れ、蒸留エーテル10mlを冷却しながら徐々に加えた。氷浴中で10分間攪拌した後、5mlの蒸留エーテルに溶かした前記(b′)4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−オン−オキシム1.0g(0.0048モル)を30分かけて滴下し、40〜45℃で4時間加熱還流させた。反応終了後、氷冷水中に反応混合物を加え、未反応のLiAlH4 を分解し吸引濾過した。エーテルで抽出を行ない、中性になるまで飽和食塩水で水洗しNa2 SO4 で乾燥後、回収した。エーテルを留去した後、粗反応油をカラムクロマトグラフィー(展開溶媒=ヘキサン:エーテル=97:3)を用いて分離・精製し、4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−イル−アミン(c′)を収率38.2%(収量=0.41g)で得た。この反応生成物のIR及び 1H−NMRスペクトルデータをそれぞれ表10及び表11に示す。
【表10】
【0019】
【表11】
【0020】
(d′)ヨノン骨格を有するチオシアナート化合物誘導体(B)4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナートの合成:
攪拌機、冷却管、及び滴下ロートを備えた50mlの四つ口フラスコに4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−イル−アミン(c′)1.0g(0.0052モル)、1,5−ジアザビシクロ[4,3,0]−5−ノネン(DBN)1.94g(0.0052×3モル)及びヘキサメチルフォスフォルアミド(HMPA)5mlを入れ、室温でチオシアン酸クロロメチル0.56g(0.0052モル)を30分かけて滴下し、4時間攪拌した。得られた粗反応油を、エーテルで抽出し、飽和食塩水で中性になるまで水洗し、Na2 SO4 で乾燥後、回収した。得られた粗反応油を、カラムクロマトグラフィー(展開溶媒=ヘキサン:酢酸エチル=8:2)を用いて分離・精製し、4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナート(B)を収率15.3%で得た。この反応生成物のIR及び 1H−NMRスペクトルデータをそれぞれ表12及び表13に示す。
【表12】
【0021】
【表13】
【0022】
以下、前記本発明化合物を使用した種々の剤型への調剤例について数例を示す。
【0023】
【0024】
【0025】
次に、本発明化合物の抗菌活性について各種試験を行ったので以下に示す。
試験例1
本発明化合物の各種細菌及び糸状菌に対する最小阻止濃度を測定した。
方法:本発明化合物A及びBをそれぞれアセトンで希釈し、各濃度になるよう添加して固体培地を調整した。調整した培地にあらかじめ前培養した供試菌株培養液を画線塗布し、25℃で3日間培養を行った。対照として無添加区およびアセトン添加区を用い、生育を阻止した最小の濃度を最小阻止濃度とした。なお、市販品の各殺菌剤、サンプラス及びフレサイドSについても同様に試験を行った。
細菌は普通寒天培地、糸状菌はポテトデキストロース寒天培地を使用した。供試した菌株は以下の通りである。
細菌
バチルス・ズブチリス(Bacillus subtilis )IFO3134
エシェリシア・コリ(Escherichia coli)IFO3301
スタフィロコッカス・オーレウス (Staphyrococcus aureus)IFO12732
糸状菌
アスペルギルス・ニガー(Aspergillus niger )IAM3301
ペニシリウム・シトリナム(Penicillium citrinum)IFO6020
フザリウム・オキシスポラム(Fusarium oxysporum)IFO7152
結果を表14に示す。
【表14】
表14に示す結果から明らかなように、本発明化合物A及びBは、市販されているフレサイドS及びサンプラスと比較して細菌、糸状菌とも抗菌活性は高かった。
【0026】
試験例2
蒸散性殺菌剤としての効力を評価した。
方法:各培地に供試菌株を画線塗布した培地の蓋に両面テープでろ紙を貼り付け、本発明化合物A及びBをそれぞれアセトンで各濃度に希釈した溶液を1ml含浸させ、アセトンを蒸散させた後、ビニールテープで密封し、25℃で3日間培養を行った。使用したシャーレは90mmφである。なお、市販品の各殺菌剤、サンプラス、フレサイドS及びPCMXについても同様に試験を行った。使用した培地及び供試菌株は試験例1と同様である。
結果を表15に示す。
【表15】
表15に示す結果から明らかなように、本発明化合物A及びBは、現在市販されている殺菌剤と比較しても抗菌活性は高かった。
【0027】
【発明の効果】
以上のように、本発明によれば抗菌活性を有する新規なヨノン骨格を有するチオシアナート化合物誘導体、即ち4−(2,6,6−トリメチル−2−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナート及び4−(2,6,6−トリメチル−1−シクロヘキセン−1−イル)−3−ブテン−2−アミノチオシアナートが提供される。
上記本発明化合物は、細菌のみならず糸状菌を含めて広範囲の微生物に対して優れた抗菌活性を有し、しかも低濃度で有効であり、殺菌剤、消毒薬などとして種々の用途に有利に用いることができる。[0001]
[Industrial applications]
The present invention relates to a thiocyanate compound having a novel yonone skeleton excellent in a bactericidal effect and a bactericide containing them.
[0002]
[Prior art]
Terpenoids contained in spices have long been known to have antibacterial activity against microorganisms. In recent years, techniques for separating and purifying terpenoids from plants have increased, and a large number of terpenoids have been produced by extraction from natural products or by synthesis and used as food additives.
[0003]
[Problems to be solved by the invention]
Table 1 shows the antibacterial activity of the main terpenoids currently used.
[Table 1]
Since all of them are used as food additives, their main purpose is to have an antibacterial effect on bacteria.
In addition, there is no report on a thiocyanate compound derivative having an yonone skeleton and an antibacterial activity thereof as provided by the present invention.
[0004]
An object of the present invention is to find a bioactive compound having an antibacterial activity against a wide range of microorganisms including not only bacteria but also filamentous fungi.
It is a further object of the present invention to provide a fungicide which uses these compounds, is effective at a low concentration against a wide range of microorganisms, and can be used for various purposes.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a thiocyanate compound derivative having a yonone skeleton represented by the following general formula (1), that is, 4- (2,6,6-trimethyl-2-cyclohexene- 1-yl) -3-butene-2-aminothiocyanate (hereinafter sometimes abbreviated as compound A of the present invention) and 4- (2,6,6-trimethyl-1-cyclohexen-1-yl)- 3-Butene-2-aminothiocyanate (hereinafter sometimes abbreviated as compound B of the present invention) is provided.
Embedded image
Further, according to the present invention, there is provided a fungicide comprising the compound A and / or B of the present invention represented by the above general formula (1) as an active ingredient.
[0006]
Operation and Mode of the Invention
The present inventors have synthesized various compounds using various terpenoids as starting materials and investigated the antibacterial activity against various microorganisms. They have found that they have excellent antibacterial activity, and have completed the present invention.
The compound of the present invention is effective at a low concentration against a wide range of microorganisms, and can be used for various uses as a bactericide, disinfectant and the like. In addition, the compound of the present invention may optionally contain a film-forming agent, a humectant, a pH adjuster, a rust inhibitor, an emulsifier, a dispersant, a spreading agent, a stabilizer, a solvent, an antioxidant, a propellant, a volatilizer, and the like. Can be used in the form of oils, emulsions, wettable powders, sprays, aerosols, smokers, coatings, electric vaporizers, powders, granules and the like.
[0007]
Hereinafter, the present invention will be described more specifically with reference to synthetic methods of the compound of the present invention and various efficacy tests.
Synthesis method:
First, a general method for synthesizing a thiocyanate compound derivative having an yonone skeleton according to the present invention will be outlined. First, as shown in the following reaction formula (2), an oxime of α-yonone (a) as a starting material is obtained. (B), followed by reduction of the oxime to give the corresponding amine (c), which is reacted with chloromethyl thiocyanate to give the compound of the present invention A (4- (2,6,6-trimethyl-2- Cyclohexen-1-yl) -3-butene-2-aminothiocyanate) is obtained.
Embedded image
[0008]
On the other hand, when β-ionone (a ′) is used as the starting material, the oxime (b ′) is used similarly to the case using α-yonone, as shown in the following reaction formula (3). And amine (c ') to give compound B of the present invention (4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-butene-2-aminothiocyanate).
Embedded image
The synthesis of the compound of the present invention is, of course, not limited to the above synthesis route.
[0009]
【Example】
Hereinafter, specific synthesis examples of the compounds A and B of the present invention will be described.
[0010]
Example 1 (Synthesis example of compound A of the present invention)
Compound A of the present invention was synthesized according to the following procedure according to the synthesis route shown in the above reaction formula (2).
(A) Sample preparation:
As α-yonone (a), a commercially available product (manufactured by Wako Pure Chemical Industries, Ltd.) was used. Its physical properties are as follows.
Boiling point: 130.0 ° C./13 mmHg, density d = 0.9298 (g / ml),
Refractive index n = 1.5041, GLC purity: 95%
Analysis method:
The obtained reaction oil was separated and purified by distillation or open column chromatography (filler: Wako Gel C-200, φ18 mm × 300 mm, manufactured by Wako Pure Chemical Industries, Ltd.) as necessary.
To determine the structure of the isolated and purified substance, IR (manufactured by JASCO Corporation, IR-810 type) and 1 H-NMR (manufactured by JEOL Ltd., JMN-MN-100 type) were used. It was confirmed from the spectrum data. Table 2 shows the results.
[Table 2]
[0011]
(B) Synthesis of 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3-buten-2-one-oxime:
In a 100 ml four-necked flask equipped with a stirrer and a reflux condenser, 2 g (0.029 mol) of hydroxylamine hydrochloride was dissolved in 10 ml of water, and 20 ml of 1N NaOH and 1 g of α-yonone (a) were added thereto. (0.005 mol) was added to the heterogeneous mixed solution, and ethanol was added until the mixture became homogeneous. After completion of the reaction, the mixture was extracted with ether to give an orange viscous liquid 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3-buten-2-one-oxime (b) in a yield of 85. Obtained at 5%. Table 3 shows IR and 1 H-NMR spectrum data of this reaction product.
[Table 3]
[0012]
(C) Synthesis of 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3-buten-2-yl-amine:
0.4 g (0.0108 mol) of LiAlH 4 was placed in a 100 ml four-necked flask equipped with a stirrer, a reflux condenser, and a dropping funnel, cooled, suspended in 10 ml of anhydrous ether, and kept at an internal temperature of 4 ° C. or lower. A mixture of 1.0 g (0.0048 mol) of 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3-buten-2-one-oxime and 5 ml of anhydrous ether Was added dropwise over 1 hour. After the completion of the dropwise addition, the mixture was heated and refluxed for 4 hours in an oil bath (35 to 40 ° C). After completion of the reaction, lithium was decomposed under ice-cooling, extracted with ether, washed with a saturated aqueous sodium chloride solution until neutral, dried, and then the solvent was distilled off to obtain 4- (2,6,6- Trimethyl-2-cyclohexen-1-yl) -3-buten-2-yl-amine (c) was obtained at a yield of 85.2%. Table 4 shows IR and 1 H-NMR spectrum data of this reaction product.
[Table 4]
[0013]
(D) 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3-buten-2-yl-amine (c) of a thiocyanate compound derivative (A) having an yonone skeleton and chlorothiocyanate Synthesis by condensation reaction with methyl:
In a 50 ml four-necked flask equipped with a stirrer, a reflux condenser, and a dropping funnel, 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3-buten-2-yl-amine ( c) Take 0.5 g (0.0026 mol) and 0.52 g (0.0026 × 2 mol) of triethylamine, and add a mixture of 0.42 g (0.0026 mol) of chloromethyl thiocyanate and 1 ml of dimethyl sulfoxide at room temperature. After dropping over 30 minutes, the mixture was stirred for 35 minutes. After the completion of the reaction, the reaction solution was extracted with ethyl acetate, washed with saturated saline until the solution became neutral, dried over Na 2 SO 4 , and collected. The resulting crude reaction oil was separated and purified by column chromatography (developing solvent = hexane: ether = 9: 1) to give 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3. -Butene-2-aminothiocyanate (A) was obtained in a yield of 32.3%. Table 5 shows IR and 1 H-NMR spectrum data of the reaction product.
[Table 5]
[0014]
Example 2 (Synthesis example of compound B of the present invention)
Compound B of the present invention was synthesized according to the following procedure according to the synthesis route shown in the above reaction formula (3).
(A ') Preparation of sample:
As β-yonone (a ′), a commercially available product (manufactured by Tokyo Chemical Industry Co., Ltd.) was used. Its physical properties are as follows.
C 13 H 20 O = 192.30,
Density d = 0.95 g / ml,
Boiling point: 140 ° C / 16mmHg
Analysis method:
The obtained reaction oil was isolated and purified using open column chromatography (filler: silica gel 60, 230 to 400 mesh).
The structure of the purified substance was determined from its spectral data using IR (IR-810, manufactured by JASCO Corporation) and 1 H-NMR (JNM-FX60Q, manufactured by JEOL Ltd.). Confirmation was made. The results are shown in Tables 6 and 7, respectively.
[Table 6]
[0015]
[Table 7]
[0016]
Synthesis of (b ′) 4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-buten-2-one-oxime:
In a 100 ml four-necked flask equipped with a stirrer and a reflux condenser, 1.00 g of 4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-buten-2-one (a ') is added. (0.0052 mol), 1.81 g (0.0052 × 5.0 mol) of hydroxylamine hydrochloride dissolved in 8 ml of water and 15 ml of 1N NaOH were added, and ethanol was added until the mixture became homogeneous. And stirred at 70-80 ° C for 24 hours. The crude reaction oil was extracted with ether, washed with saturated saline until neutral, dried over Na 2 SO 4 and collected. The solvent was distilled off, and the crude reaction oil was separated and purified using column chromatography (developing solvent = hexane: ether = 96: 4) to give an orange viscous liquid 4- (2,6,6-trimethyl-1-). Cyclohexen-1-yl) -3-buten-2-one-oxime (b ′) was obtained in a yield of 52.32% (yield = 0.56 g). Tables 8 and 9 show IR and 1 H-NMR spectrum data of this reaction product, respectively.
[Table 8]
[0017]
[Table 9]
[0018]
Synthesis of (c ′) 4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-buten-2-yl-amine:
In a 50 ml four-necked flask equipped with a stirrer, a reflux condenser, and a dropping funnel, 0.23 g (0.0048 × 1.3 mol) of LiAlH 4 was added, and 10 ml of distilled ether was gradually added while cooling. After stirring in an ice bath for 10 minutes, the above (b ') 4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-buten-2-one- dissolved in 5 ml of distilled ether. 1.0 g (0.0048 mol) of oxime was added dropwise over 30 minutes, and the mixture was heated to reflux at 40 to 45 ° C. for 4 hours. After completion of the reaction, the reaction mixture was added to ice-cold water to decompose unreacted LiAlH 4 and suction-filtered. The mixture was extracted with ether, washed with saturated saline until neutral, dried over Na 2 SO 4 , and collected. After distilling off the ether, the crude reaction oil was separated and purified using column chromatography (developing solvent = hexane: ether = 97: 3) to obtain 4- (2,6,6-trimethyl-1-cyclohexene-1). -Yl) -3-buten-2-yl-amine (c ') was obtained in a yield of 38.2% (yield = 0.41 g). Tables 10 and 11 show IR and 1 H-NMR spectrum data of this reaction product, respectively.
[Table 10]
[0019]
[Table 11]
[0020]
(D ') Synthesis of thiocyanate compound derivative having an yonone skeleton (B) Synthesis of 4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-butene-2-aminothiocyanate:
4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-buten-2-yl-amine (c ′) is placed in a 50 ml four-necked flask equipped with a stirrer, a condenser, and a dropping funnel. ) 1.0 g (0.0052 mol), 1.94 g (0.0052 × 3 mol) of 1,5-diazabicyclo [4,3,0] -5-nonene (DBN) and hexamethylphosphoramide (HMPA) 5 ml was added, and 0.56 g (0.0052 mol) of chloromethyl thiocyanate was added dropwise over 30 minutes at room temperature, followed by stirring for 4 hours. The resulting crude reaction oil was extracted with ether, washed with saturated saline until neutral, dried over Na 2 SO 4 , and collected. The resulting crude reaction oil was separated and purified using column chromatography (developing solvent = hexane: ethyl acetate = 8: 2) to give 4- (2,6,6-trimethyl-1-cyclohexen-1-yl). ) -3-Butene-2-aminothiocyanate (B) was obtained at a yield of 15.3%. Tables 12 and 13 show IR and 1 H-NMR spectrum data of this reaction product, respectively.
[Table 12]
[0021]
[Table 13]
[0022]
Hereinafter, several examples of the preparation of various dosage forms using the compound of the present invention will be described.
[0023]
[0024]
[0025]
Next, various tests were conducted on the antibacterial activity of the compound of the present invention, and the results are shown below.
Test example 1
The minimum inhibitory concentrations of the compound of the present invention against various bacteria and filamentous fungi were measured.
Method: Compounds A and B of the present invention were each diluted with acetone, and added to each concentration to prepare a solid medium. A culture solution of the test strain which had been pre-cultured in advance was streaked on the adjusted medium, and cultured at 25 ° C. for 3 days. As a control, a group without addition and a group with addition of acetone were used, and the minimum concentration at which growth was inhibited was defined as the minimum inhibitory concentration. In addition, the test was similarly performed for each of the commercially available fungicides, Sampras and Freside S.
A normal agar medium was used for bacteria, and a potato dextrose agar medium was used for filamentous fungi. The strains tested are as follows.
Bacteria Bacillus subtilis IFO3134
Escherichia coli IFO3301
Staphylococcus aureus IFO12732
Filamentous fungi Aspergillus niger IAM3301
Penicillium citrinum IFO6020
Fusarium oxysporum IFO7152
Table 14 shows the results.
[Table 14]
As is clear from the results shown in Table 14, the compounds A and B of the present invention had higher antibacterial activities against bacteria and filamentous fungi as compared with commercially available Freside S and Sampras.
[0026]
Test example 2
The efficacy as a transpiration fungicide was evaluated.
Method: A filter paper was stuck with a double-sided tape on the lid of the medium in which the test strain was streaked on each medium, and 1 ml of a solution obtained by diluting each of the compounds A and B of the present invention with acetone at each concentration was impregnated, and the acetone was evaporated. After that, the cells were sealed with a vinyl tape and cultured at 25 ° C. for 3 days. The petri dish used is 90 mmφ. In addition, the same test was carried out for each of the commercially available fungicides, Sampras, Freside S and PCMX. The medium and test strain used were the same as in Test Example 1.
Table 15 shows the results.
[Table 15]
As is clear from the results shown in Table 15, the compounds A and B of the present invention had higher antibacterial activities than the currently available fungicides.
[0027]
【The invention's effect】
As described above, according to the present invention, a thiocyanate compound derivative having a novel yonone skeleton having antibacterial activity, that is, 4- (2,6,6-trimethyl-2-cyclohexen-1-yl) -3-butene-2. -Aminothiocyanate and 4- (2,6,6-trimethyl-1-cyclohexen-1-yl) -3-butene-2-aminothiocyanate are provided.
The compound of the present invention has excellent antibacterial activity against a wide range of microorganisms including bacteria as well as filamentous fungi, and is effective at a low concentration, and is advantageous for various uses as a bactericide, disinfectant, etc. Can be used.
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