[2,3]-Sigmatropic Rearrangement of Ynamides: Preparation of α-Amino Allenephosphonates
作者:Filipe Gomes、Antoine Fadel、Nicolas Rabasso
DOI:10.1021/jo300790m
日期:2012.6.15
synthesized from unprotected 1-bromopropargyl alcohols using a copper(II) catalyzed coupling reaction. In the second step, the previously prepared ynamides were transformed directly to allenes through a [2,3]-sigmatropic rearrangement of propargyl phosphites. This efficient method led to the formation of a series of α-amino allenephosphonates with diverse substituents on the amine, the phosphonate, and the
从受保护的胺,炔丙醇和亚磷酸酯容易地分两步制备α-氨基烯丙基膦酸酯。首先,使用铜(II)催化的偶联反应,由未保护的1-溴炔丙醇合成乙酰胺。在第二步中,通过炔丙基亚磷酸酯的[2,3]-σ重排将先前制备的炔酰胺直接转化为亚丙基。这种有效的方法导致形成一系列在胺,膦酸酯和丙二烯基团上具有不同取代基的α-氨基丙二烯基膦酸酯。