申请人:Miles Laboratories, Inc.
公开号:US04026911A1
公开(公告)日:1977-05-31
Reaction of a 2-methyl-2-(alkenyl)-1,3-dioxolane with an .alpha.,.omega.-dihalogenoalkane to obtain a 2-methyl-2-(.omega.-chloroalkynyl)-dioxolane, conversion of the latter to a corresponding nitrile, and hydrolysis of the nitrile to form a ketoalkynoic acid is a novel process for preparing the acid. Use of the process in the synthesis of 2-(substituted)-cyclopentane-1,3,4-triones improves that synthesis.
将2-甲基-2-(烯烃基)-1,3-二氧兰与α,ω-二卤代烷反应,制备2-甲基-2-(ω-氯代炔基)-二氧兰,将后者转化为相应的腈,然后水解腈形成酮炔酸是制备该酸的一种新方法。在合成2-(取代基)-环戊烷-1,3,4-三酮时使用该方法可以改善合成过程。