Phosphonates α-lithies agents de transfert fonctionnel. Preparation de phosphonates α-amides et d'amides α, β-insatures, α-substitues
作者:M.K. Tay、E. About-Jaudet、N. Collignon、P. Savignac
DOI:10.1016/s0040-4020(01)89078-5
日期:——
strategy), or by condensation of an amide enolate with diethylchlorophosphate (second strategy). Acidic hydrolysis of () or () gives α-amidophosphonate () alkylated or not in the α -position. () and () react with aromatic or aliphatic aldehydes to produce α,β-unsatured secondary or tertiary amides ().
仲或叔α-氨基膦酸酯的锂化阴离子()或()可通过α-膦酰基碳负离子与异氰酸酯或氨基甲酸酯之间的反应制备(第一种策略),或通过酰胺烯酸酯与二乙基氯磷酸酯的缩合制备(第二种策略)。()或()的酸水解产生α-氨基膦酸酯()在α位上烷基化或未烷基化。()和()与芳族或脂族醛反应生成α,β-不饱和仲或叔酰胺()。