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公开(公告)号：CA1123005A
公开(公告)日：1982-05-04
申请号：CA185651
申请日：1973-11-13
Applicant: STAMICARBON
Inventor： SCHAAFSMA SIJBRANDUS E , HOFMAN JOHANNES H A , CLAASSENS JOHANNES E L
IPC: C07C69/716 , B01J31/00 , C07B61/00 , C07C20060101 , C07C67/313 , C07C67/347 , C07C69/66 , C07C69/73 , C07C69/74
Abstract: Delta-keto-esters such as 4-oxopentane-1-carboxylic acid methyl ester and the like, are prepared in the presence of a primary amine, a Schiff base, or both, by reacting a ketone having at least one hydrogen atom in the alpha position and an alpha-beta unsaturated carboxylic acid ester in the presence of an acid according to the disclosed invention.
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公开(公告)号：CA1019769A
公开(公告)日：1977-10-25
申请号：CA194940
申请日：1974-03-13
Applicant: STAMICARBON
IPC: B01J21/00 , B01J21/18 , B01J23/00 , C07B61/00 , C07C45/00 , C07C45/45 , C07C49/403 , C07C49/713 , C07C67/00
Abstract: Process for the preparation of cyclohexane-1,3-diones of the formula WHEREIN R1-R8, which are the same or different, are each hydrogen or an alkyl group containing up to 6 carbon atoms and the total number of carbon atoms of R1-R8 is not more than 12 carbon atoms, comprising contacting in the gaseous state a delta-keto ester of the formula HOR3R5R7O ¦ PARALLEL ¦¦¦ PARALLEL R1-C-C-C-C-C-C-OR9 ¦¦¦¦ R2R4R6R8 wherein R1-R8 are as defined above and R9 is an alkyl, cycloalkyl, or monocyclic or bicyclic arylalkyl or aryl group containing up to 12 carbon atoms, with a thermally stable solid material having an internal surface area of from about 100 tot 1500 m2/gm. at a temperature of from 100 DEG C to 500 DEG C.
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