作者:A. Lechevallier、F. Huet、J.M. Conia
DOI:10.1016/s0040-4020(01)91581-9
日期:1983.1
α-cyclopropylidene carbinols (the 1,2-addition product). Addition of methyl-lithium and lithium dimethylcuprate lead to the expected 1,2- and 1,4-addition products, respectively. The comparison of these results and those corresponding to α-isopropylidene-ketones confirms the higher tendency of α-cyclopropylidene-ketones to give 1,4-addition products; the measurement of polarographic reduction potentials confirms
α-环亚丙基酮和醛对在酸性或碱性介质,水和盐酸中的1,4-加成甲醇显示高反应活性,从而生成α-(1-甲氧基环丙基)酮和醛α-(1-羟基环丙基)酮和α -(1-氯环丙基)酮和醛。α-环亚丙基-酮与格氏试剂的反应除α-环亚丙基-甲醇(1,2-加成产物)外,主要产生α-环丙基酮(1,4-加成产物)。甲基锂和二甲基二甲基锂锂的加入分别导致了预期的1,2-和1,4-加成产物。将这些结果与对应于α-异亚丙基-酮的结果进行比较,证实了α-环亚丙基-酮产生1,4-加成产物的趋势更高;极谱还原电位的测量结果证实了这一点,在某些情况下,这种差异。HOBr(NBS,DMSO,H2 O)与α-环亚丙基酮一起生成α-羟基β-溴代酮,而相应的α-异亚丙基酮则生成β-羟基α-溴代酮。