[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

Das et al., 2007 - Google Patents

An efficient synthesis of 1, 8-dioxo-octahydroxanthenes using heterogeneous catalysts

Das et al., 2007

Document ID
309431270494925820
Author
Das B
Thirupathi P
Reddy K
Ravikanth B
Nagarapu L
Publication year
Publication venue
Catalysis Communications

External Links

Snippet

1, 8-Dioxo-octahydroxanthenes have efficiently been synthesized from 5, 5-dimethyl-1, 3- cyclohexanedione and aromatic aldehydes using silica supported sodium hydrogen sulfate (NaHSO4· SiO2) or silica chloride as a heterogeneous catalyst. The experimental procedure …
Continue reading at www.sciencedirect.com (other versions)

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
    • C07C45/72Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/673Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by change of size of the carbon skeleton
    • C07C45/676Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by change of size of the carbon skeleton by elimination of carboxyl groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D311/00Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/58Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulfur atoms in positions 2 or 4
    • C07D311/70Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulfur atoms in positions 2 or 4 with two hydrocarbon radicals attached in position 2 and elements other than carbon and hydrogen in position 6
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D311/00Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/22Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4
    • C07D311/26Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4 with aromatic rings attached in position 2 or 3
    • C07D311/28Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 4 with aromatic rings attached in position 2 or 3 with aromatic rings attached in position 2 only
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/51Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
    • C07C45/511Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition involving transformation of singly bound oxygen functional groups to >C = O groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/587Unsaturated compounds containing a keto groups being part of a ring
    • C07C49/687Unsaturated compounds containing a keto groups being part of a ring containing halogen
    • C07C49/697Unsaturated compounds containing a keto groups being part of a ring containing halogen containing six-membered aromatic rings
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/27Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
    • C07C45/29Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation of hydroxy groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/45Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by condensation
    • C07C45/46Friedel-Crafts reactions
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2101/00Systems containing only non-condensed rings
    • C07C2101/12Systems containing only non-condensed rings with a six-membered ring
    • C07C2101/16The ring being unsaturated
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/44Radicals substituted by doubly-bound oxygen, sulfur, or nitrogen atoms, or by two such atoms singly-bound to the same carbon atom
    • C07D213/46Oxygen atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C47/00Compounds having -CHO groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D213/00Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/06Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D493/00Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
    • C07D493/02Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00Esters of carboxylic acids; Esters of carbonic or haloformic acids

Similar Documents

Publication Publication Date Title
Das et al. An efficient synthesis of 1, 8-dioxo-octahydroxanthenes using heterogeneous catalysts
Das et al. Amberlyst-15: An efficient reusable heterogeneous catalyst for the synthesis of 1, 8-dioxo-octahydroxanthenes and 1, 8-dioxo-decahydroacridines
Das et al. Iodine catalyzed simple and efficient synthesis of 14-aryl or alkyl-14-H-dibenzo [a, j] xanthenes
Hekmatshoar et al. Sodium selenate catalyzed simple and efficient synthesis of tetrahydro benzo [b] pyran derivatives
Chandrasekhar et al. L-Proline-catalyzed one-pot synthesis of 2-aryl-2, 3-dihydroquinolin-4 (1H)-ones
Ahmed et al. Silica gel supported TaBr5: new catalyst for the facile and rapid cyclization of 2′-aminochalcones to the corresponding 2-aryl-2, 3-dihydroquinolin-4 (1H)-ones under solvent-free conditions
Das et al. A simple and efficient synthesis of gem-dihydroperoxides from ketones using aqueous hydrogen peroxide and catalytic ceric ammonium nitrate
Yadav et al. Niobium (V) chloride-catalyzed C–H insertion reactions of α-diazoesters: synthesis of β-keto esters
Grandane et al. Facile synthesis of coumarin bioisosteres—1, 2-benzoxathiine 2, 2-dioxides
Tseng et al. Cerium salts in the oxidative free radical reactions between 2-amino-1, 4-naphthoquinones and β-dicarbonyl compounds
Paul et al. A simple route to 9-fluorenylidenes by domino Suzuki/Heck coupling reactions
Kokare et al. Oxalic acid as a catalyst for efficient synthesis of bis-(indolyl) methanes, and 14-aryl-14H-dibenzo [a, j] xanthenes in water
Coleman et al. Stereocontrolled synthesis of anthracene β-C-ribosides: fluorescent probes for photophysical studies of DNA
Roshchin et al. Synthesis of benzofurans via Pd2+-catalyzed oxidative cyclization of 2-allylphenols
Pettus et al. A fully synthetic route to the neurotrophic illicinones by sequential aromatic claisen rearrangements
Das et al. Synthesis of gem-dihydroperoxides from ketones using silica-supported sodium hydrogen sulfate as a heterogeneous catalyst
Khosropour et al. Green, new and efficient tandem oxidation and conversion of aryl alcohols to 2, 4, 6-triarylpyridines promoted by [HMIm] NO3-[BMIm] BF4 as a binary ionic liquid
Das et al. A simple and efficient one-pot synthesis of β-acetamido carbonyl compounds using sulfated zirconia as a heterogeneous recyclable catalyst
Das et al. Application of heterogeneous catalysts for an efficient synthesis of β-keto enol ethers
Das et al. An efficient synthesis of benzyl bromides from aromatic aldehydes using polymethylhydrosiloxane and (bromodimethyl) sulfonium bromide or N-bromosuccinimide
Satrawala et al. Base-catalyzed cross coupling of secondary alcohols and aryl-aldehydes with concomitant oxidation of alcohols to ketones: An alternative route for synthesis of the Claisen-Schmidt condensation products
Ray et al. Base-catalyzed condensation of β-bromovinylaldehydes with β-ketoesters followed by water-mediated cyclization and aromatization: one-pot access to substituted benzene derivatives
Chavan et al. An efficient synthesis of (±)-β-herbertenol by a 1, 3-cyclopentadione annelation strategy
Hyuga et al. Organic Synthesis Using Haloboration Reaction. XXI. A Synthesis of Prostaglandin B1 Methyl Ester by the Stepwise Cross-Coupling Reaction Using (E)-(2-Bromoethenyl) diisopropoxyborane.
Yin et al. Formation of 2-halomethylene-4-cyclopentene-1, 3-diones and/or 2-halo-1, 4-benzoquinones via ring-expansion of 4-ethynyl-4-hydroxy-2, 3-substituted-2-cyclobuten-1-ones. Total synthesis of methyl linderone