A Convenient Lactonization of 2- and 3-Cyclopropylalkanoic Acids to γ- and δ-Lactones
作者:Kotoji Sugahara、Tsutomu Fujita、Shoji Watanabe、Masami Sakamoto、Ken-ich Sugimoto
DOI:10.1055/s-1990-27014
日期:——
A convenient preparative method of obtaining 2,2,4,5,5-pentaalkyl-δ- valerolactones 2a-d or 2,2,4,4-tetraalkyl-γ-butyrolactones 4a-e by the acid-catalyzed lactonization of 3-cyclopropylalkanoic acids, and for obtaining bicyclo-γ-lactones 6a-d from bicyclic 2-cyclopropylalkanoic acids 5a-d is presented.
本文介绍了一种制备方法,通过3-环丙基链烷酸的酸催化内酯化反应,可方便地获得2,2,4,5,5-五烷基-γ-戊内酯2a-d或2,2,4,4-四烷基-γ-丁内酯4a-e,以及从双环2-环丙基链烷酸5a-d中获取双环-γ-内酯6a-d。