enantioselectivity was also discussed in terms of steric and electronic effects. Coupled with chemical hydrolysis of D-(-)-alpha-phenylglycine amide, biotransformation of DL-phenylglycine nitrile was applied in practical scale to produce both D- and L-phenylglycines in high optical purity.
在红球菌属中被
腈水合酶和
酰胺酶催化。AJ270细胞在非常温和的条件下,许多α-芳基-和α-烷基取代的DL-甘
氨酸腈1迅速经历高度对映选择性
水解,从而得到D-(-)-
α-氨基酸酰胺2和L-(+ )-
α-氨基酸3的收率很高,多数情况下对映异构体过量。腈类
生物转化的总体对映选择性源于高L-对映选择性
酰胺酶和低对映选择性
腈水合酶的综合作用。还在空间和电子效应方面讨论了底物对反应效率和对映选择性的影响。加上D-(-)-α-
苯基甘
氨酸
酰胺的
化学水解,