Preparation of 5-Alkyl-3-carboxymethylrhodanines and Their Aldose Reductase Inhibitory Activity.
作者:Yoshitaka OHISHI、Teruo MUKAI、Michiko NAGAHARA、Motoyuki YAJIMA、Norio KAJIKAWA
DOI:10.1248/cpb.40.907
日期:——
5-Alkyl-3-carboxymethylrhodanines (2) were prepared from 5-alkylmethylidene-3-carboxymethylrhodanines (1). The exo double bond of 1 was successfully reduced with NaBH4. The 1, 4-addition reaction path was confirmed on the basis of proton nuclear magnetic resonance spectrum of the product (4b) obtained from the reduction of 3 using NaBD4. Optical resolution of the tert-butyl compound (2i) was achieved upon epimerization-crystallization method using L-3-amino-ε-caprolactam. The alkyl compounds (2) and the optical active compounds ((+)-2i, (-)-2i) were evaluated for aldose reductase inhibitory potency.
由 5-烷基亚甲基-3-羧甲基罗丹宁(1)制备出 5-烷基-3-羧甲基罗丹宁(2)。用 NaBH4 成功还原了 1 的外向双键。根据用 NaBD4 还原 3 得到的产物(4b)的质子核磁共振谱,确认了 1,4-加成反应路径。通过使用 L-3-amino-ε-caprolactam 的表聚-结晶方法,实现了叔丁基化合物 (2i) 的光学解析。对烷基化合物(2)和光学活性化合物((+)-2i、(-)-2i)进行了醛糖还原酶抑制效力评估。