Enantioselective Synthesis of Differently Protected 1,2-Diamines via α-Alkylation of Dibenzylaminoacetaldehyde SAMP-Hydrazone
作者:Dieter Enders、Robert Schiffers
DOI:10.1055/s-1996-4166
日期:1996.1
Chiral, unsymmetrically and differently protected 1,2-diamines 4 were prepared in moderate to good overall yields and with high asymmetric inductions (ee = 91-99%) by α-alkylation of N,N-dibenzylaminoacetaldehyde SAMP-hydrazone (S)-2 with subsequent oxidative cleavage to the corresponding α-aminonitriles, reduction to the diamines, and protection of the latter.
通过δ-烷基化 N,N-二苄基氨基乙醛 SAMP- 酰腙 (S)-2,随后氧化裂解为相应的δ-氨基硝酰胺,还原为二胺,并对后者进行保护,制备了手性、非对称和不同保护的 1,2-二胺 4,总产率中等至良好,且具有较高的不对称诱导性(ee = 91-99%)。