A process for preparing cyclopentenolones of the formula: ##STR1## wherein R.sub.1 is a straight, branched or cyclic alkyl group having not more than 6 carbon atoms, a straight, branched or cyclic alkenyl group having not more than 6 carbon atoms, a straight or branched alkynyl group having not more than 6 carbon atoms or a group of the formula: ##STR2## wherein R.sub.2 is a hydrogen atom, a methyl group or a halogen atom directly from the corresponding furan-carbinols of the formula: ##STR3## wherein R.sub.1 is as defined above in a single step with an excellent yield, characterized in that the furan-carbinols are treated with water in the presence or absence of a catalyst.
一种制备
环戊烯酮的方法,其
化学式为:##STR1## 其中R.sub.1是直链、支链或环烷基,其碳原子数不超过6个;直链、支链或环烯基,其碳原子数不超过6个;直链或支链炔基,其碳原子数不超过6个;或者是
化学式:##STR2## 其中R.sub.2是氢原子、甲基基团或卤素原子。该方法可直接从相应的
呋喃-碳醇中以极高的收率一步制备出所需的
环戊烯酮,其中
呋喃-碳醇在存在或不存在催化剂的情况下与
水反应。