FR2233937A1 - 2,6-Dinitroaniline herbicides prepn - by mixed acid nitration of anilines without blocking of sec. amine groups - Google Patents
2,6-Dinitroaniline herbicides prepn - by mixed acid nitration of anilines without blocking of sec. amine groupsInfo
- Publication number
- FR2233937A1 FR2233937A1 FR7422133A FR7422133A FR2233937A1 FR 2233937 A1 FR2233937 A1 FR 2233937A1 FR 7422133 A FR7422133 A FR 7422133A FR 7422133 A FR7422133 A FR 7422133A FR 2233937 A1 FR2233937 A1 FR 2233937A1
- Authority
- FR
- France
- Prior art keywords
- prepn
- mixed acid
- anilines
- sec
- blocking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B43/00—Formation or introduction of functional groups containing nitrogen
- C07B43/02—Formation or introduction of functional groups containing nitrogen of nitro or nitroso groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Prepn. of herbicidal cpds. of formula (I) (where Y is 1-4C alkyl, halogen CF3; Z is H, halogen; 1-4C alkyl opt. substd. by one halogen or 1-4C alkoxy; 1-4C alkoxy; Ra is 1-6C alkyl, 4-6C cycloalkyl, 1-4C alkoxy - 1-4C alkyl; Rb is H or one of the values of Ra) comprises nitration of the corresp. N-alkylanilines with a mixed acid within the limits 60% HNO3 8% H2SO4, 32% H2O; 50% HNO3, 35% H2SO4, 15% H2O; 2% HNO3, 68% H2SO4, 30% H2O; 2% HNO3, 20% H2SO4, 70% H2O AT 0-70 degrees C. The process avoids the need to block the amino gp. by acylation when Rb is H. This is overcome by denitrosation of the by-prod. N-nitroso cpd. by treating it with HC1 and sulphamic acid.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US37307773A | 1973-06-25 | 1973-06-25 | |
| US37307973A | 1973-06-25 | 1973-06-25 | |
| US37307873A | 1973-06-25 | 1973-06-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2233937A1 true FR2233937A1 (en) | 1975-01-17 |
| FR2233937B1 FR2233937B1 (en) | 1979-02-09 |
Family
ID=27409108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7422133A Granted FR2233937A1 (en) | 1973-06-25 | 1974-06-25 | 2,6-Dinitroaniline herbicides prepn - by mixed acid nitration of anilines without blocking of sec. amine groups |
Country Status (20)
| Country | Link |
|---|---|
| JP (1) | JPS5925781B2 (en) |
| AR (1) | AR214707A1 (en) |
| BG (1) | BG25788A3 (en) |
| BR (1) | BR7405158D0 (en) |
| CH (3) | CH605618A5 (en) |
| CS (3) | CS184848B2 (en) |
| DD (3) | DD120431A5 (en) |
| DE (1) | DE2429958C2 (en) |
| DK (1) | DK152751C (en) |
| FR (1) | FR2233937A1 (en) |
| HU (1) | HU170762B (en) |
| IL (1) | IL44927A (en) |
| IN (1) | IN139715B (en) |
| IT (1) | IT1016118B (en) |
| NL (2) | NL183579C (en) |
| PL (1) | PL93741B1 (en) |
| RO (2) | RO70150A (en) |
| SE (1) | SE416198B (en) |
| SU (1) | SU897108A3 (en) |
| YU (1) | YU39721B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3063762D1 (en) * | 1979-08-24 | 1983-07-21 | American Cyanamid Co | N-denitration of n,2,6-trinitroanilines with phase transfer catalysts |
| CN109320424B (en) * | 2017-07-31 | 2021-12-21 | 江苏永安化工有限公司 | Method for purifying pendimethalin |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3504033A (en) * | 1967-09-08 | 1970-03-31 | American Cyanamid Co | Process for preparing n-tertiary-alkylanilines and their hydrohalide salts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1207397B (en) * | 1963-06-22 | 1965-12-23 | Hoechst Ag | Process for the preparation of 4-chloro- and 4-methoxy-2,6-dinitraniline |
-
1974
- 1974-05-30 IL IL44927A patent/IL44927A/en unknown
- 1974-05-31 IN IN1198/CAL/74A patent/IN139715B/en unknown
- 1974-06-10 AR AR254137A patent/AR214707A1/en active
- 1974-06-20 IT IT51637/74A patent/IT1016118B/en active
- 1974-06-21 DE DE2429958A patent/DE2429958C2/en not_active Expired
- 1974-06-21 YU YU1748/74A patent/YU39721B/en unknown
- 1974-06-24 HU HU74AE00000418A patent/HU170762B/en unknown
- 1974-06-24 SE SE7408285A patent/SE416198B/en not_active IP Right Cessation
- 1974-06-24 BR BR5158/74A patent/BR7405158D0/en unknown
- 1974-06-24 DK DK338974A patent/DK152751C/en not_active IP Right Cessation
- 1974-06-24 PL PL1974172146A patent/PL93741B1/pl unknown
- 1974-06-24 SU SU742038395A patent/SU897108A3/en active
- 1974-06-25 NL NLAANVRAGE7408514,A patent/NL183579C/en not_active IP Right Cessation
- 1974-06-25 FR FR7422133A patent/FR2233937A1/en active Granted
- 1974-06-25 CS CS7600006395A patent/CS184848B2/en unknown
- 1974-06-25 JP JP49072714A patent/JPS5925781B2/en not_active Expired
- 1974-06-25 CH CH1229277A patent/CH605618A5/xx not_active IP Right Cessation
- 1974-06-25 RO RO7488141A patent/RO70150A/en unknown
- 1974-06-25 DD DD188248A patent/DD120431A5/xx unknown
- 1974-06-25 DD DD188247A patent/DD120432A5/xx unknown
- 1974-06-25 CS CS7600006394A patent/CS184847B2/en unknown
- 1974-06-25 CS CS7400004463A patent/CS184828B2/en unknown
- 1974-06-25 BG BG027074A patent/BG25788A3/en unknown
- 1974-06-25 CH CH1229377A patent/CH605612A5/xx not_active IP Right Cessation
- 1974-06-25 CH CH872274A patent/CH605613A5/xx not_active IP Right Cessation
- 1974-06-25 DD DD179464A patent/DD115111A5/xx unknown
- 1974-06-25 RO RO7479298A patent/RO70074A/en unknown
-
1988
- 1988-01-08 NL NL8800037A patent/NL8800037A/en active Search and Examination
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3504033A (en) * | 1967-09-08 | 1970-03-31 | American Cyanamid Co | Process for preparing n-tertiary-alkylanilines and their hydrohalide salts |
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