Cyclic as well as acyclic ketones, both saturated and α,β-unsaturated, can be converted into their homologous enamines by Horner-Wittig reaction with -methyl--anilinomethyl diphenylphosphine oxide ().
饱和的和α,β-不饱和的环状和无环酮都可以通过与-甲基--
苯胺基甲基
二苯基膦氧化物()进行的霍纳-威蒂希反应转化为它们的同源烯胺。