Facile Total Syntheses of Idarubicinone‐7‐β‐<scp>D</scp>‐glucuronide: Convenient Preparations of AB‐Ring Synthon Using Some Carboxylic Acid Derivatives
作者:Young S. Rho、Jihyung Park、Gyuil Kim、Hyesun Kim、Hongsig Sin、Pyoung Won Suh、Dong Jin Yoo
DOI:10.1081/scc-120030758
日期:2004.12.31
Regiospecific syntheses of idarubicinone coupled with D-glucuronic acid are described. Cyclization of dimethoxybenzene with carboxylic acid derivatives in polyphosphoric acid (PPA) in one step afforded the naphthalenones 7, which were transformed to the (+/-)-idarubicinone 3b by general methods. Esterification of (+/-)-3b with (S)-(+)-O-acetylmandelic acid with subsequent separation and deprotection gave (+)-3b and (-)-3b. Reaction of separated two stereoisomers with acetobromo-alpha-D-glucuronic acid methyl ester respective followed by hydrolysis using lithium hydroxide and amberite cation exchange resin furnished two kinds of idarubicinone-7-beta-D-glucuronide (20 and 21) that are coupled at C-7 position of idarubicinone.