申请人:Sumitomo Chemical Company, Limited
公开号:US04535182A1
公开(公告)日:1985-08-13
2-Cyclopentenone esters of the formula: ##STR1## wherein R.sup.1 is hydrogen, lower alkyl or lower alkenyl, R.sup.2 is lower alkyl, lower alkenyl, lower alkynyl, or cycloalkyl, cycloalkenyl or substituted or unsubstituted aryl and R.sup.3 is hydrogen or lower alkyl are prepared in high yields by reacting the corresponding racemic or optically active 4-cyclopentenone of the formula: ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above and R.sup.3 is hydrogen or acyl with at least one lower aliphatic carboxylic acid and/or metal or amine salts thereof.
公式为:##STR1##其中R.sup.1为氢、低碳基或低烯基,R.sup.2为低碳基、低烯基、低炔基、环烷基、环烯基或取代或未取代芳基,R.sup.3为氢或低碳基。通过将相应的外消旋或光学活性的4-环戊烯酮(公式如下)##STR2##其中R.sup.1和R.sup.2均如上定义,R.sup.3为氢或酰基,与至少一种低脂肪羧酸和/或其金属或胺盐反应,可以高产率地制备出上述公式中的2-环戊烯酮酯。