申请人:Sagami Chemical Research Center
公开号:US03970673A1
公开(公告)日:1976-07-20
A process for preparing a bicyclic .gamma.-lactone represented by the formula (I) ##SPC1## wherein R represents a hydrogen atom or a straight or branched chain alkyl group having 1 to 4 carbon atoms and n is an integer of 1 to 6, which comprises condensing a cycloalkene diol compound represented by the formula (II) ##SPC2## wherein n is as defined above, with an orthocarboxylic acid ester represented by the formula (III) r--ch.sub.2 --c(or.sup.1).sub.3 (iii) wherein R is as defined above and R.sup.1 represents a straight or branched chain alkyl group having 1 to 4 carbon atoms, in the presence of an acidic catalyst.
制备一种由公式(I)表示的双环.gamma.-内酯的方法,其中R代表氢原子或具有1至4个碳原子的直链或支链烷基,n为1至6的整数,包括将由公式(II)表示的环烷二醇化合物与由公式(III)表示的正羧酸酯在酸性催化剂存在下缩合,其中r-ch.sub.2-c(or.sup.1).sub.3(iii)中R如上所定义,R.sup.1表示具有1至4个碳原子的直链或支链烷基。