double bond was reacted with a catalytic amount of Pd(PPh3)4 to afford the cyclized product in good yield and the same product was obtained by treatment of ketene silyl acetal with divalent palladium complex.
使具有内部双键的α-卤代酯与催化量的Pd(PPh 3)4反应,以良好的收率得到环化产物,并且通过用二价
钯络合物处理
乙烯酮甲
硅烷基
乙缩醛获得相同的产物。