β-dimethylglycidate by aminolysis with benzylamine, followed by hydrogenolysis. N-Benzoyl-DL-β-hydroxyvaline was resolved by use of (−)-α-methylbenzylamine to yield (−)-N-benzoyl-β-hydroxyvaline. The configuration of VI was determined by converting it to methyl N-benzoyl-β-chlorovalinate (I) and subsequent hydrogenolysis of I yielded (−)methyl N-benzoylvalinate (II). From II, optically pure D-(−)-valine was
DL-β-羟基缬
氨酸是由β,β-二甲基
缩水甘油酸
钠通过苯
甲胺氨解,然后氢解合成的。N-苯甲酰基-DL-β-羟基缬
氨酸通过使用 (-)-α-甲基
苄胺进行拆分,得到 (-)-N-苯甲酰基-β-羟基缬
氨酸。VI 的构型通过将其转化为 N-苯甲酰基-β-
氯缬
氨酸甲酯 (I) 和随后的 I 氢解得到 (-) 甲基 N-苯甲酰基缬
氨酸 (II) 来确定。从II,
水解后获得光学纯的D-(-)-缬
氨酸。