Facile synthesis of 1,4-benzodiazepin-3-ones from o-bromobenzylamines and amino acids via a cascade coupling/condensation process
作者:Hexiang Wang、Yongwen Jiang、Kun Gao、Dawei Ma
DOI:10.1016/j.tet.2009.06.104
日期:2009.10
with DPPA) provides 1,4-benzodiazepin-3-ones in moderate yields. Using l-proline and l-valine as the starting materials enantiopure products are obtained although partial racemization occurs for other amino acids.
CuI催化的2-溴苄胺和α-氨基酸的偶合以及随后的缩合环化(直接或由DPPA介导)以中等收率提供了1,4-苯并二氮杂-3-酮。使用1-脯氨酸和1-缬氨酸作为起始原料,获得对映体纯产物,尽管其他氨基酸发生部分外消旋化。