Poststatin, a New Inhibitor of Prolyl Endopeptidase. III. Optical Resolution of 3-Amino-2-hydroxyvaleric Acid and Absolute Configuration of Poststatin.
作者:MAKOTO TSUDA、YASUHIKO MURAOKA、MACHIKO NAGAI、TAKAAKI AOYAGI、TOMIO TAKEUCHI
DOI:10.7164/antibiotics.49.281
日期:——
3-Amino-2-hydroxyvaleric acid was prepared, and separated into its diastereomers. The relative stereochemistry was determined by 1H NMR in their oxazolidone derivatives. The threo-isomer was resolved by (S)-1-(1-naphthyl) ethylamine in the N-(p-methoxybenzyloxycarbonyl) derivative. The absolute configuration of (--)-threo-3-(p-methoxybenzyloxycarbonyl)amino-2-hydroxyvaleric acid was confirmed to be 2R
制备了3-氨基-2-羟基戊酸,并分离成其非对映异构体。通过1H NMR测定它们的恶唑烷酮衍生物的相对立体化学。通过(S)-1-(1-萘基)乙胺在N-(对甲氧基苄氧基羰基)衍生物中拆分苏式异构体。证实(-)-苏式-3-(对甲氧基苄氧基羰基)氨基-2-羟基戊酸的绝对构型为2R,3S。通过比较N衍生自3的N,O-双(3,5-二硝基苯甲酰基)-3-氨基-2-羟基戊酸甲酯的四种立体异构体,证实了他汀类药物中3-氨基-2-氧代戊酸的绝对构型为S. -氨基-2-羟基戊酸和由他汀类药物的3-氨基-2-氧代戊酰基部分衍生的HPLC,采用手性柱。