申请人:Sumitomo Chemical Company, Limited
公开号:US04282372A1
公开(公告)日:1981-08-04
A novel process for producing cyclopentenolones, useful intermediates for producing agricultural chemicals and prostaglandins of the formula (I), ##STR1## wherein R.sub.1 is a hydrogen atom or a lower alkyl group, and R.sub.2 is a hydrogen atom, a lower alkyl, lower alkenyl or lower alkynyl group or a group of the formula, ##STR2## in which R.sub.4 is a hydrogen atom, a methyl group or a halogen atom), --CH.sub.2 --CH.dbd.CH--(CH.sub.2).sub.3 --CO.sub.2 R.sub.5, or --(CH.sub.2).sub.5 --CO.sub.2 R.sub.5 (in which R.sub.5 is a hydrogen atom or a lower alkyl group), but R.sub.1 and R.sub.2 are not a hydrogen atom at the same time, characterized in that said cyclopentenolones are derived from a starting material of the formula (III), ##STR3## through intermediates of the formulae (IV), (V) and (II), ##STR4## Many of the intermediates are novel compounds.
一种用于生产环戊烯酮烯醇的新工艺,该环戊烯酮烯醇是生产农药和公告素的有用中间体,其中公式(I)中R.sub.1是氢原子或低碳基,R.sub.2是氢原子、低碳基、低烯基或低炔基,或者是公式--CH.sub.2 --CH.dbd.CH--(CH.sub.2).sub.3 --CO.sub.2 R.sub.5或--(CH.sub.2).sub.5 --CO.sub.2 R.sub.5(其中R.sub.5是氢原子或低碳基),但是R.sub.1和R.sub.2不能同时是氢原子,其特点在于所述环戊烯酮烯醇是从公式(III)的起始材料衍生而来,通过公式(IV)、(V)和(II)的中间体,其中许多中间体是新化合物。