Process for preparing optically active cyclopentenones
申请人:Sumitomo Chemical Company, Limited
公开号:US05191109A1
公开(公告)日:1993-03-02
An improved process for preparing an optically active 4-hydroxycyclopentenone of the formula: ##STR1## wherein R is a lower alkyl, the symbol means double bond or triple bond, and the * marked carbon is an asymmetric carbon, and the corresponding racemic 4-hydroxycyclopentenone, which are useful as an intermediate for preparing medicinal or agricultural products, particularly pharmaceutically active prostaglandins, and intermediates for preparing the optically active and/or racemic 4-hydroxycyclopentenone.
4,5-Unsaturated 16-hydroxy prostanoic acid derivatives displaying valuable pharmacological properties, e.g. gastric antisecretory, are described herein.
本文描述了具有有价值的药理特性(例如胃抗分泌作用)的4,5-不饱和16-羟基前列腺酸衍生物。
Method of resolution of hydroxy-cyclopentenones using a lipase and transacylation agents
申请人:G.D. Searle & Co.
公开号:EP0357009A2
公开(公告)日:1990-03-07
A process for irreversible regio- and stereoselective enzyme catalyzed acylation of alcohols using enol esters as acylating reagents is disclosed. The present invention permits the selective modification of hydroxyl group(s) of chiral and meso alcohols, including sugars, organometallics, and glycosides. The enol freed upon transesterification rapidly tautomerizes to the corresponding volatile aldehyde or ketone thereby preventing the reverse reaction from occurring.
Synthesis and gastric antisecretory properties of 4,5 unsaturated derivatives of 15-deoxy-16-hydroxy-16-methylprostaglandin E1
作者:Paul W. Collins、Esam Z. Dajani、Raphael Pappo、Alan F. Gasiecki、Robert G. Bianchi、Emmett M. Woods
DOI:10.1021/jm00360a002
日期:1983.6
The synthesis and gastric antisecretory activities of the delta 4,5-cis, delta 4,5-trans, and 4,5-acetylenic analogues of 15-deoxy-16-hydroxy-16-methyl prostaglandin E1 methyl ester are described. The key step in the preparation of these compounds involved the stereospecific conjugateaddition of a cupratereagent to the appropriate cyclopentenones. Although the trans and acetylenic derivatives were