Optical Resolution by Preferential Crystallization of (1RS,3RS)-1,2,3,4-Tetrahydro-6,7-dihydroxy-1-methyl-3-isoquinolinecarboxylic Acid
作者:Tadashi Shiraiwa、Ryuuichi Kiyoe
DOI:10.1248/cpb.53.1197
日期:——
isoquinolinecarboxylic acid [(1RS,3RS)-1] was examined based on the melting point, solubility, and IR spectrum, with the aim of optical resolution by preferential crystallization. (1RS,3RS)-1 was indicated from these results to exist as a conglomerate. The successive optical resolution by preferential crystallization of (1RS,3RS)-1 yielded (1S,3S)- and (1R,3R)-1 with optical purities of 85--95% at
根据熔点检查了(1RS,3RS)-1,2,3,4-四氢-6,7-二羟基-1-甲基-3-异喹啉羧酸[(1RS,3RS)-1]的外消旋结构,溶解度和IR光谱,目的是通过优先结晶来实现光学拆分。从这些结果可以看出(1RS,3RS)-1以集团形式存在。通过优先结晶(1RS,3RS)-1进行的连续光学拆分产生了(1S,3S)-和(1R,3R)-1,在66--81%的拆分度下其光学纯度为85--95%,通过重结晶完全纯化。