Synthesis and properties of trans 1-aryl-2-benzoylcyclopropanes and their vinyloges
作者:L.A. Yanovskaya、V.A. Dombrovsky、O.S. Chizhov、B.M. Zolotarev、O.A. Subbotin、V.F. Kucherov
DOI:10.1016/0040-4020(72)88038-4
日期:1972.1
1-Aryl-2-benzoylethylenes react with dimethyloxosulfonium methylide in dimethylformamide and form trans 1-aryl-2-benzoylcyclopropanes, the configuration of which was confirmed by double 13C NMR spectroscopy. The reaction proceeds exclusively at the double bond adjacent to carbonyl group with 1-aryl-4-benzoylbuta-1,3-dienes and 1-aryl-6-benzoylhexa-1,3,5-trienes and leads to trans 1-(2′-(aryl)vinyl
1-芳基-2-苯甲酰基乙烯与二甲基甲酰胺中的二甲基氧os亚甲基反应,形成反式1-芳基-2-苯甲酰基环丙烷,其构型通过双13 C NMR光谱法确认。反应仅在与羰基相邻的双键处与1-芳基-4-苯甲酰基丁1,3-二烯和1-芳基-6-苯甲酰基六-1,3,5-三烯进行,并生成反式1-(2 '-(芳基)乙烯基)-2-苯甲酰基环丙烷和反式1-(4-芳基丁烯-1',3'-二烯基)-2-苯甲酰基环丙烷。红外光谱和紫外光谱的证据表明,所有化合物中羰基和环丙烷环之间都发生共轭。苯甲酰基环丙烷的质谱特征是共有离子。对于1-芳基-2-苯甲酰基环丙烷,该公共离子的强度与分子离子的强度之比与Hammett-Brown 6常数相关。还报道了1-芳基] -2-苯甲酰基环丙烷的极谱行为。