A practical and diastereoselective synthesis of angiotensin converting enzyme inhibitors.
作者:Genji IWASAKI、Rieko KIMURA、Naganori NUMAO、Kiyosi KONDO
DOI:10.1248/cpb.37.280
日期:——
The diastereoselective synthesis of a series of potent angiotensin converting enzyme (ACE) inhibitors is described. The optically active intermediate, N-carbamyl (R)-2-amino-4-phenylbutyric acid (2) leading to (R)-2-halogeno or (R)-2-hydroxy-4-phenylbutyric acid was prepared by asymmetric hydrolysis of DL-5-phenethylhydantoin (1) by microbial hydantoinase. The halogenoester was subjected to SN2 reaction with L-amino acid derivatives to afford N-substituted amino acids, which were easily converted to ACE inhibitors or intermediates by deprotection.
描述了一系列有效的血管紧张素转化酶(ACE)抑制剂的立体选择性合成。通过微生物氢氨酰化酶的不对称水解法,制备了光学活性中间体N-carbamyl (R)-2-amino-4-phenylbutyric acid (2),该中间体可进一步转化为(R)-2-卤代或(R)-2-羟基-4-苯基丁酸。卤代酯通过SN2反应与L-氨基酸衍生物反应,生成N-取代氨基酸,这些化合物通过去保护反应可以很容易转化为ACE抑制剂或中间体。