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公开(公告)号:CA757659A
公开(公告)日:1967-04-25
申请号:CA757659D
Applicant: STAMICARBON
Inventor: KOOPAL SIEDS , DEUMENS JOHANNES J M , VERSTRIJDEN ULRICH , PESCH WILLEM
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公开(公告)号:CA1001636A
公开(公告)日:1976-12-14
申请号:CA164569
申请日:1973-02-26
Applicant: STAMICARBON
Inventor: THOMA JOZEF A , DEUMENS JOHANNES J M , VERHEIJEN EGIDIUS J M
IPC: B01J23/00 , C07B61/00 , C07D311/20 , C11B9/00
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公开(公告)号:CA895909A
公开(公告)日:1972-03-21
申请号:CA895909D
Applicant: STAMICARBON
Inventor: GROEN SIEMEN H , DEUMENS JOHANNES J M
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公开(公告)号:CA895884A
公开(公告)日:1972-03-21
申请号:CA895884D
Applicant: STAMICARBON
Inventor: DEUMENS JOHANNES J M , THOMA JOZEF A
IPC: C07D295/02
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公开(公告)号:CA791157A
公开(公告)日:1968-07-30
申请号:CA791157D
Applicant: STAMICARBON
Inventor: VERSTRIJDEN ULRICH , DEUMENS JOHANNES J M
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公开(公告)号:CA1001638A
公开(公告)日:1976-12-14
申请号:CA172732
申请日:1973-05-30
Applicant: STAMICARBON
Inventor: DEUMENS JOHANNES J M , VERHEIJEN EGIDIUS J M , THOMA JOZEF A
IPC: B01J23/00 , C07B61/00 , C07D311/08 , C07D311/10 , C07D311/14
Abstract: Coumarin, a useful flavoring agent resembling vanilla beans, is produced by contacting dihydrocoumarin with a small quantity of a dehydrogenation catalyst such as palladium or platinum at elevated temperatures, optionally in the presence of oxygen. The alkylated dihydrocoumarin compounds may also be processed according to the disclosed procedure to produce the corresponding alkyl substituted products.
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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.
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公开(公告)号:CA981268A
公开(公告)日:1976-01-06
申请号:CA109973
申请日:1971-04-08
Applicant: STAMICARBON
Inventor: LIPSCH JOHANNES M J G , JANSSEN PETRUS H J , DEUMENS JOHANNES J M , GROEN SIEMEN H
IPC: C07D215/06 , B01J23/00 , C07B61/00 , C07D211/12 , C07D211/62 , C07D211/70 , C07D213/08 , C07D213/09
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公开(公告)号:CA917671A
公开(公告)日:1972-12-26
申请号:CA917671D
Applicant: STAMICARBON
Inventor: DEUMENS JOHANNES J M , GROEN SIEMEN H
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