Kinetic and mechanistic studies on the rearrangement of 1-(substituted phenyl)-1,3-dimethoxy-2-propanones
作者:Guo-qiang Cheng、Zhi-fen Li、Pang Zhang
DOI:10.1016/s0008-6215(00)90539-1
日期:1991.8
mechanism of rearrangement of 1-(substituted phenyl)-1,3-dimethoxy-2-propanones to give substituted benzylglyoxal dimethyl acetals ( 5 ) was studied by kinetic measurements, by the effects of acid catalysis, by rearangements in the absence of acid and in the presence of base, by solvent effects, by effects of temperature, and by mass spectroscopy. It is concluded that the title ketones rearrange by a sigmatropic
摘要通过动力学测量,酸催化作用,在不存在苯甲酸的情况下进行重排,研究了1-(取代苯基)-1,3-二甲氧基-2-丙烷重排生成取代的苄基乙二醛二甲基乙缩醛(5)的机理。酸和碱的存在下,通过溶剂的作用,通过温度的影响,和通过质谱。结论是,标题酮是通过σ而不是S n 1'的烯丙基位移而重排的。