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-(烯丙基)-1,3-二氧杂环己烷与α,ω-二卤代烷反应,制备2-甲基-2-(ω-氯炔基)-二氧杂环己烷,将后者转化为相应的腈,并水解腈以形成酮炔酸,这是一种制备该酸的新方法。将该方法用于合成2-(取代基)-环戊-1,3,4-三酮可以改善该合成过程。