Synthesis of α,β-unsaturated aldehydes through palladium catalyzed regioselective hydrogen migration
作者:Tatsuya Minami、Miyoji Hanaoka
DOI:10.1016/s0040-4039(00)78560-1
日期:1994.12
Treatment of cyclic carbonate of 3-alkene-1,2-diols or 4-methylcarbonate of 2-alkene-1,4-diols with a catalytic amount of Pd(PPh3)4 in aqueous THF or AcOH gave α,β-unsaturated aldehydes in good yields. The reaction can be interpreted by the regioselective 1,4-hydrogen migration of π-allylpalladium intermediate.
在THF或AcOH水溶液中用催化量的Pd(PPh 3)4处理3-烯烃-1,2-二醇的环状碳酸酯或2-烯烃-1,4-二醇的4-甲基碳酸酯,得到α,β-不饱和醛收率高。该反应可以通过π-烯丙基铝中间体的区域选择性1,4-氢迁移来解释。