Amino acids as suitable N-nucleophiles for the aza-Michael reaction of vinylphosphoryl compounds in water
作者:Ekaterina V. Matveeva、Anatoly E. Shipov、Pavel V. Petrovskii、Irina L. Odinets
DOI:10.1016/j.tetlet.2011.09.111
日期:2011.12
β-aminophosphonates and β-aminophosphine oxides in excellent yields and of high purity. The approach is equally suitable for the synthesis of both racemic and optically active compounds. In the case of glycine, the mono and bis(phosphonoethyl)-substituted products are formed in 6:4 ratio and when using a stoichiometric amount of the reactants, N,N-bis[2-(diethoxyphosphoryl)ethyl]glycine was the only product
用水作为唯一溶剂可促进乙烯基乙膦酸二乙酯和二苯基乙烯基膦氧化物与就地生成的α-取代氨基酸钠盐的aza-Michael反应,从而以优异的收率和高纯度提供相应的β-氨基膦酸盐和β-氨基膦氧化物。该方法同样适用于外消旋和旋光活性化合物的合成。在甘氨酸的情况下,单和双(膦酰基乙基)取代的产物以6:4的比例形成,并且当使用化学计量的反应物时,N,N-双[2-(二乙氧基磷酰基)乙基]甘氨酸是唯一的产品。相反,为了进行d,1-丙氨酸的双膦酰基乙基化,需要长时间加热反应混合物。