作者:N. A. Keiko、Yu. A. Chuvashev、L. G. Stepanova、M. G. Voronkov
DOI:10.1007/bf02641546
日期:1998.12
medium at 20°C under kinetically controlled conditions is the Markovnikoff addition at the C=C bond to form 2,2-dialkoxypropanals (methylglyoxal ketals). Under conditions of thermodynamic control, subsequent acetalization of the aldehyde group occurs to form 1,1,2,2-tetraalkoxypropanes. When the duration of the reaction is further increased in the absence of a water acceptor, the ketal group undegroes hydrolysis
醇与 α-烷氧基丙烯醛在酸性介质中在动力学控制条件下于 20°C 反应的第一阶段是在 C=C 键上进行马尔可夫尼科夫加成以形成 2,2-二烷氧基丙醛(甲基乙二醛缩酮)。在热力学控制条件下,醛基随后发生缩醛化以形成 1,1,2,2-四烷氧基丙烷。当在不存在水受体的情况下进一步增加反应持续时间时,缩酮基团不进行水解并形成甲基乙二醛缩醛。开发了一种制备甲基乙二醛缩酮的方法。