Invention Grant
- Patent Title: Bis(indolyl)ethylene process
- Patent Title (中): 双（吲哚基）乙烯工艺
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Application No.: US261945Application Date: 1988-10-24
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Publication No.: US4897494APublication Date: 1990-01-30
- Inventor: Hubertus Psaar , Horst Berneth
- Applicant: Hubertus Psaar , Horst Berneth
- Applicant Address: DEX Leverkusen
- Assignee: Bayer Aktiengesellschaft
- Current Assignee: Bayer Aktiengesellschaft
- Current Assignee Address: DEX Leverkusen
- Priority: DEX3738237 19871111
- Main IPC: C07D209/14
- IPC: C07D209/14 ; C07D209/08 ; C07D209/24
Abstract:
Bis(indolyl)ethylenes of the formula ##STR1## wherein R.sub.1 denotes hydrogen, alkyl, aralkyl or aryl,R.sub.2 denotes hydrogen, alkyl or aryl,R.sub.3 denotes hydrogen, alkyl, alkenyl, COOH or aryl andR.sub.4 denotes hydrogen, alkyl, alkoxy, cycloalkoxy or halogen, andthese substituents, in turn, can carry non-ionic radicals or a carboxyl group,are obtained by reaction of indoles of the formula ##STR2## with carboxylic acids of the formulaR.sub.3 --CH.sub.2 --COOH (III)their chlorides, esters, for example alkyl esters, or anhydrides in the presence of phosphorus oxychloride.
Public/Granted literature
- US5535042A Light scanning device Public/Granted day:1996-07-09
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