Asymmetric synthesis of syn and anti methyl 2,3-diamino-3-phenylpropanoate derivatives from N-substituted imines and Schöllkopf's bislactim ether
作者:Giuseppe Cremonesi、Piero Dalla Croce、Maddalena Gallanti、Concetta La Rosa
DOI:10.1016/j.tet.2014.01.040
日期:2014.3
(2R)-Schöllkopf's bislactim ether was studied: the azaenolate addition to imines followed by hydrolysis of the resulting adducts gave syn-(2S,3R) and anti-(2S,3S)-methyl 2,3-diamino-3-phenylpropanoate derivatives in good yields. The configurations of the newly formed stereocenters of α,β-diamino acids were assigned on the basis of the 1H NMR analysis and by comparison with known products. The diastereoisomeric