As. Sagiyan et al., ASYMMETRIC-SYNTHESIS OF BETA-N-SUBSTITUTED ALPHA,BETA-DIAMINO ACIDS VIA A CHIRAL COMPLEX OF NI-II WITH A DEHYDROALANINE DERIVATIVE, Russian chemical bulletin, 46(3), 1997, pp. 483-486
Asymmetric synthesis of beta-N-substituted (S)-alpha,beta-diamino acid
s was accomplished by Michael addition of amines to the Ni-II complex
of the Schiff base derived from (S)-2-[N-(N'-benzylprolyl)amino)benzop
henone (BPB) and dehydroalamine. Diastereoselectivity of the reaction
is kinetically and thermodynamically controlled. The chiral auxiliary
reagent, BPB, can be recovered and reused.