Thiourea catalysts activated α,β-unsaturated phosphonates and phosphinates toward conjugate addition by amines to give β-aminophosphonates and β-aminophosphinates. The organocatalytic methodology was used to synthesise 15 β-aminophosphonates and -phosphinates in yields up to 99%. A gram-scale example furnished the corresponding β-aminophosphonate in an isolated yield of 99% with 97% catalyst recovery
硫脲催化剂活化 α,β-不饱和
膦酸盐和
次膦酸盐,通过胺进行共轭加成,得到 β-
氨基膦酸盐和 β-
氨基
次膦酸盐。有机催化方法用于合成 15 β-
氨基膦酸盐和 -
亚膦酸盐,产率高达 99%。一个克级的例子以 99% 的分离产率和 97% 的催化剂回收率提供了相应的 β-
氨基膦酸酯。基于机械实验,
磷酰氧和
硫脲之间的氢键被认为在底物活化中起着至关重要的作用。