Stereoselective synthesis of 4-amino-3-hydroxy-2-methylpentanoic acids: stereochemistry of the amino acid occurring in the marine toxin janolusimide
作者:Assunta Giordano、Aldo Spinella、Guido Sodano
DOI:10.1016/s0957-4166(99)00191-3
日期:1999.5
acid, an amino acid constituent of the hexapeptide portion of the antitumor antibiotic bleomycin A2, have been stereoselectively synthesized by crotylboration of N-Boc-l-alaninal. The synthesis allowed the assignment of the stereochemistry as 2R,3S,4S to the 4-amino-3-hydroxy-2-methylpentanoic acid occurring in the tripeptide marine toxin janolusimide.
抗肿瘤抗生素博来霉素A 2的六肽部分的氨基酸组成的4-氨基-3-羟基-2-甲基戊酸的四个非对映异构体,是通过N -Boc-1-丙氨酸的巴豆基硼烷基化立体合成的。该合成允许将立体化学的2 R,3 S,4 S分配给三肽海洋毒素janolusimide中的4-氨基-3-羟基-2-甲基戊酸。