triphenylphosphine in the presence of trifluoroacetic acid to afford the corresponding β-hydroxyalkyl phosphonium salt. Wittig type reaction of aldehydes with the salt under basic condition readily occurred to form optically active α-trifluoromethylated allylic alcohols. The trans-selectivity of these reactions were discussed.
(S)-3,3,3-三
氟氧化
丙烯在
三氟乙酸的存在下与
三苯基膦反应,得到相应的β-羟烷基phospho盐。在碱性条件下,醛与盐的维蒂希型反应容易发生,形成旋光性α-三
氟甲基化的烯丙基醇。讨论了这些反应的反式选择性。