Enantiospecific Synthesis and Cytotoxicity Evaluation of Ligudentatol: A Programmed Aromatization Approach to the 2,3,4-Trisubstituted Phenolic Motif via Visible-Light-Mediated Group Transfer Radical Cyclization
作者:Gamal A. I. Moustafa、Hiroshi Suizu、Hiroshi Aoyama、Masayoshi Arai、Shuji Akai、Takehiko Yoshimitsu
DOI:10.1002/asia.201400110
日期:2014.6
facile enantiospecific approach to (+)‐ligudentatol (1) and (−)‐ligudentatol (ent‐1) is reported. The approach features the construction of a trisubstituted phenolic motif fused to a chiral aliphatic ring by a sequence of visible‐light‐mediated radical seleno transfer cyclization, bromination, concomitant selenoxide elimination–dehydrobromination, and demethoxycarbonylation, namely, a programmed aromatization
-一种简便对映体特异性的方法来(+)ligudentatol(1( - ) - (ligudentatol)和ENT - 1)被报告。该方法的特征是通过一系列可见光介导的自由基硒基转移环化,溴化,亚硒酸酯消除-脱氢溴化和脱甲氧基羰基化(即程序化的芳构化),构建与手性脂族环融合的三取代酚基。通过本途径获得的利古他多对映体的生物学评估首次揭示了它们对各种癌细胞系的细胞毒性。