Asymmetric Synthesis of α-Deuterated α-Amino Acids through Nonenzymatic Transamination Reaction and the Determination of Their Enantiomeric Excesses
作者:Yoji Tachibana、Makoto Ando、Hiroyoshi Kuzuhara
DOI:10.1246/bcsj.56.3652
日期:1983.12
acids were prepared in methano-d through Zn2+-catalyzed transamination reaction between the chiral pyridoxamine analogs, (R)- or (S)-15-aminomethyl-14-hydroxy-5,5-dimethyl-2,8-dithia[9] (2,5)pyridinophane and various α-keto acids with enantiomeric excesses ranging from 40 to 94%. Aliphatic α-keto acids gave α-deuterated α-amino acids, whereas aromatic ones possessing a methylene group between the carbonyl
通过手性吡哆胺类似物 (R)- 或 (S)-15-氨基甲基-14-羟基-5,5-二甲基- 之间的 Zn2+ 催化氨基转移反应,在甲氧基-d 中制备了具有旋光活性的 α-氘化 α-氨基酸。 2,8-dithia[9] (2,5)pyridinophane 和各种 α-酮酸,对映体过量范围为 40% 至 94%。脂肪族α-酮酸产生α-氘代α-氨基酸,而在羰基(酮)和芳环之间具有亚甲基的芳香族酮酸在活性亚甲基基团处经历伴随的氘取代,从而产生在两个α-氘化氨基酸- 和羧基的 β 位。(S)-吡哆胺类似物的使用产生过量的(R)-氘化α-氨基酸,反之亦然。通过氨基酸与手性吡哆醛类似物(R)-或(S)-15-甲酰基-14-羟基缩合产生的希夫碱的1H NMR光谱分析确定氨基酸的对映体过量-2,8-二硫杂[9](2, 5)吡啶酚。一个...