作者:Christophe Dugave、Jérôme Cluzeau、André Ménez、Michel Gaudry、Andrée Marquet
DOI:10.1016/s0040-4039(98)01207-6
日期:1998.8
ano)butyrate (ee = 96%) were synthesised in respectively 43% and 40% overall yields by addition of sodium malonate derivatives onto Boc-dehydroalanine methyl ester followed by regio- and stereoselective hydrolysis of α-methyl ester by α-chymotrypsin. These regio-and stereoselectivities were strongly dependent on the nature of the γ-substituents.
分别在(43)中合成了(2S,4RS)-Boc-4-氰基谷氨酸γ-甲酯(ee = 95%)和(2S)-Boc-2-氨基-4-双(氰基)丁酸酯(ee = 96%)通过将丙二酸钠衍生物加到Boc-脱氢丙氨酸甲酯上,然后通过α-胰凝乳蛋白酶对α-甲酯进行区域和立体选择性水解,可得到总收率的40%和40%的总收率。这些区域选择性和立体选择性强烈取决于γ-取代基的性质。