申请人:Sumitomo Chemical Company, Limited
公开号:US04970345A1
公开(公告)日:1990-11-13
A process for preparing oxocyclopentenes of the formula: ##STR1## wherein R.sup.1 is hydrogen, lower alkyl or lower alkenyl and R.sup.2 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, substituted or unsubstituted aryl, ar(lower)alkyl, thienyl or cycloalkyl, which comprises subjecting a furan-carbinol of the formula: ##STR2## wherein R.sup.1 is as defined above and R.sup.3 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, substituted or unsubstituted aryl, ar(lower)alkyl, thienyl or cycloalkyl to rearrangement, subjecting the resultant hydroxycyclopentenone of the formula: ##STR3## wherein R.sup.1 and R.sup.3 are each as defined above to hydrogenation and subjecting the resulting hydroxycyclopentanone of the formula; ##STR4## wherein R.sup.1 and R.sup.2 are each as defined above to dehydration.
一种制备公式为:##STR1##其中R.sup.1是氢、低烷基或低烯基,R.sup.2是氢、低烷基、低烯基、低炔基、取代或未取代芳基、芳基(低)烷基、噻吩基或环烷基的氧代环戊烯的方法,包括将公式为:##STR2##其中R.sup.1如上所定义,R.sup.3是氢、低烷基、低烯基、低炔基、取代或未取代芳基、芳基(低)烷基、噻吩基或环烷基的呋喃甲醇经过重排,将公式为:##STR3##其中R.sup.1和R.sup.3如上所定义的羟基环戊酮经过氢化,将公式为:##STR4##其中R.sup.1和R.sup.2如上所定义的羟基环戊酮经过脱水。