Transformation of cyclopentane-1,3-diones into cyclohexane-1,4-diones - a novel ring enlargement process
作者:Siegfried Schramm、Birgit Roatsch、Egon Gründemann、Hans Schick
DOI:10.1016/s0040-4039(00)74081-0
日期:1993.7
4-diones (3-acetyl-2-alkylcyclohex-3-en-4-olones) by treatment with an equimolar amount of sodium hydroxide in water or sodium methoxide in methanol. This ring enlargement can be considered as the result of an intramolecular aldol reaction followed by a ring opening of the formed bicyclo[3.1.0]hexane system.
将2-烷基-2-(2-氧丙基)环戊烷-1,3-二酮平稳地转化为2-乙酰基-3-烷基环己烷-1,4-二酮(3-乙酰基-2-烷基环己基-3-en-4-用等摩尔量的氢氧化钠水溶液或甲醇钠的甲醇溶液处理。这种环的扩大可以认为是分子内羟醛反应随后形成的双环[3.1.0]己烷体系开环的结果。