Synthesis of (3<i>S</i>, 4<i>S</i>)- and (3<i>S</i>, 4<i>R</i>)-4-Amino-3-hydroxy-6-methylheptanoic Acid, and Their<i>N</i>-(Acetyl-L-valyl-L-valyl) Derivatives
作者:Mitsuhiro Kinoshita、Akito Hagiwara、Shinpei Aburaki
DOI:10.1246/bcsj.48.570
日期:1975.2
ptanoic acid (10a) present in pepstatins, specific inhibitors of acid proteases, and its (+) (3S,4R) diastereomer (10b) were synthesized starting from 3-deoxy-1,2-O-isopropylidene-α-D-erythro-pentodialdo-1,4-furanose (1) through highly stereoselective and stereospecific routes. The partial pep tide of pepstatin Ac, N-(acetyl-L-valyl-L-valyl)-(3S,4S)-4-amino-3-hydroxy-6-methylheptanoic acid (15a) and
存在于胃蛋白酶抑制剂、酸性蛋白酶的特异性抑制剂及其 (+) (3S,4R) 非对映异构体 (10b) 中的天然 (-)(3S,4S)-4-氨基-3-羟基-6-inethylheptanoic 酸 (10a) 是从 3-deoxy-1,2-O-isopropylidene-α-D-erythro-pentodialdo-1,4-furanose (1) 通过高度立体选择性和立体特异性路线合成。胃酶抑素Ac、N-(乙酰基-L-缬氨酰-L-缬氨酰)-(3S,4S)-4-氨基-3-羟基-6-甲基庚酸(15a)及其(3S,4R)的部分肽非对映异构体 (15b) 是通过 10a 和 10b 的叔丁酯分别与乙酰基-L-缬氨酰-L-缬氨酸叠氮化物的叠氮偶联合成的。化合物15a抑制胃蛋白酶的蛋白水解,然而,非对映异构体15b对胃蛋白酶没有抑制作用。