作者:A.S. Saghiyan、A.V. Geolchanyan、S.G. Petrosyan、T.V. Ghochikyan、V.S. Haroutunyan、A.A. Avetisyan、Yu.N. Belokon’、K. Fisher
DOI:10.1016/j.tetasy.2003.12.007
日期:2004.2
A new efficient method of asymmetric synthesis of β-heterocycle substituted l-α-amino acids through the addition of 3-amino-1,2,4-thiodiazole and 5-mercapto-1,2,4-triazoles, containing various substituents at the 3 and 4 positions, to the CC bond of dehydroalanine in the Ni(II) complex of its Schiff base with (S)-2-N-(N′-benzylprolyl)aminobenzophenone has been elaborated upon. Under thermodynamic
通过添加3-氨基-1,2,4-硫代二唑和5-巯基-1,2,4-三唑的不对称合成β-杂环取代的1-α-氨基酸的新有效方法在3个4位,以脱氢丙氨酸的在镍(II)络合物及其席夫碱与(的CC键小号)-2- ñ - (ñ ' -benzylprolyl)氨基二苯甲酮已被详细阐述。在热力学控制下,亲核加成的立体选择性超过94%。将反应混合物酸分解后,分离出具有高对映体纯度(ee> 98.5%)的相应β-杂环取代的α-氨基酸。