4-Hydroxy-2-alkenyldiphenylphosphine oxides, prepared by a phosphorus-controlled allylic rearrangement, give dianions and hence α-hydroxydienes (substituted penta-2,4-dienols) by the Horner-Wittig reaction.
通过
磷控制的烯丙基重排制备的
4-羟基-2-烯基二苯基氧化膦通过霍纳-维蒂希反应产生二价阴离子,因此产生α-羟基二烯(取代的5,2,4-二烯
酚)。