A process for preparing cyclopentenone derivatives of the formula: ##STR1## wherein R.sup.1 is hydrogen, lower alkyl or lower alkenyl, R.sup.2 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, cycloalkyl, substituted or unsubstituted aryl or substituted or unsubstituted ar(lower)alkyl and A is the residue of a nucleophilic agent from which a hydrogen atom is excluded, which comprises reacting a 3-hydroxy-4-cyclopentenone compound of the formula: ##STR2## wherein R.sup.1 and R.sup.2 are each as defined above with a nucleophilic agent of the formula A--H (III) wherein A is as defined above. The cyclopentenone derivatives of the formula (I) are useful as pharmaceuticals, agricultural chemicals, perfumes and as intermediates for the preparation of agricultural chemicals, pharmaceuticals and perfumes.
一种制备
环戊酮衍
生物的方法,该衍
生物的
化学式为:##STR1## 其中,R1为氢、低碳基或低烯基,R2为氢、低碳基、低烯基、低炔基、环烷基、取代或未取代芳基或取代或未取代的芳基(低)烷基,A是从中排除了一个氢原子的亲核试剂的残基,包括将
化学式为:##STR2## 其中R1和R2均如上所定义的3-羟基-4-
环戊酮化合物与
化学式为A-H(III)的亲核试剂反应。
化学式(I)的
环戊酮衍
生物可用作制药、农业
化学品、
香料以及制药、农业
化学品和
香料的中间体。