公开(公告)号：US3925422A

公开(公告)日：1975-12-09

申请号：US33624373

申请日：1973-02-27

Applicant: STAMICARBON

Inventor： SCHAAFSMA SIJBRANDUS E ,  DEUMENS JOHANNES J M

IPC: C07D311/74

CPC classification number: C07D311/74

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( Beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200*C at a temperature of 140*-245*C and a pressure of 6-200 mm Hg. The hexahydrocoumarin product may be dehydrogenated to form dihydrocoumarin which is used in the perfume industry.

Abstract translation: 公开了一种制备3,4,5,6,7,8-六氢香豆素的方法，其中2-（β-羧乙基） - 环己酮在催化量的常压沸点高于200℃的强酸存在下被加热 温度为140〜-245℃，压力为6〜200mmHg。

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.

公开(公告)号：CA1001637A

公开(公告)日：1976-12-14

申请号：CA165004

申请日：1973-03-01

Applicant: STAMICARBON

Inventor： SCHAAFSMA SIJBRANDUS E ,  DEUMENS JOHANNES J M

IPC: C07D311/74

Abstract: A process for preparing 3,4,5,6,7,8-hexahydrocoumarin is disclosed, wherein 2-( beta -carboxyethyl)-cyclohexanone is heated in the presence of catalytic amount of a strong acid having a atmospheric boiling point above 200 DEG C at a temperature of 140 DEG -245 DEG C and a pressure of 6-200 mm Hg.

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

Inventor： SCHAAFSMA SIJBRANDUS E ,  CLAASSENS JOHANNES E L ,  VERHEIJEN EGIDIUS J M

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.

公开(公告)号：CA1016959A

公开(公告)日：1977-09-06

申请号：CA194939

申请日：1974-03-13

Applicant: STAMICARBON

Inventor： SCHAAFSMA SIJBRANDUS E ,  CLAASSENS JOHANNES E L ,  VERHEIJEN EGIDIUS J M

IPC: C07C37/06 ,  B01J23/00 ,  C07B61/00 ,  C07C27/00 ,  C07C37/00 ,  C07C39/08 ,  C07C67/00

公开(公告)号：CA969195A

公开(公告)日：1975-06-10

申请号：CA141661

申请日：1972-05-09

Applicant: STAMICARBON

Inventor： SCHAAFSMA SIJBRANDUS E

IPC: C08K5/103

Abstract: 1327354 Esters STAMICARBON NV 12 May 1972 [14 May 1971] 22431/72 Heading C2C [Also in Division C3] The invention comprises a diester derived from 1-(2-hydroxyethoxy) propanol-2 and/or 2-(2-hydroxyethoxy) propanol-1, wherein either both of the acid moieties are benzoic acid, or one of the acid moieties is benzoic acid and the other is a saturated C 6 -C 12 aliphatic carboxylic acid. The compounds are prepared by reacting the appropriate alcohols and acids at between 200‹ and 300‹ C. and separating reaction water from the reaction mixture during reaction by evaporation.