作者:A. Lechevallier、F. Huet、J.M. Conia
DOI:10.1016/s0040-4020(01)91580-7
日期:1983.1
of α-keto- or α- formyl acetals by Witting reaction with cyclopropylidenetriphenyl-phosphorane leads to α cyclopropylidene-acetals, easily deacetalized by moist silicagel into the corresponding α-cyclopropylidene-ketone and α-cyclopropylidene-aldehydes. The conversion of the latter to the former is also easily carried out by reaction with Grignard reagents followed by oxidation with active manganese
通过与环亚丙基三苯基苯基膦的润湿反应,使α-酮-或α-甲缩醛进行环丙基亚甲基化,生成α-环亚丙基-缩醛,容易被潮湿的硅胶缩醛化为相应的α-环亚丙基-酮和α-环亚丙基-醛。后者向前者的转化也很容易通过与格氏试剂反应,然后用活性二氧化锰氧化如此形成的环亚丙基-卡宾醇来进行。关于新的α,β-不饱和羰基化合物的构象,讨论了它们的光谱性质。