Synthesis of ellipticine by reaction of 1-(4-methoxybenzyl)indole-2,3-dicarboxylic anhydride with (3-bromo-4-pyridyl)triisopropoxytitanium
作者:Yasuyoshi Miki、Hiroko Hachiken、Norihide Yanase
DOI:10.1039/b105116b
日期:——
Reaction of 1-benzyl- and 1-(4-methoxybenzyl)indole-2,3-dicarboxylic anhydride with (3-bromo-4-pyridyl)triisopropoxytitanium gave the corresponding 2-acylindole-3-carboxylic acids as the sole product. Deprotection of the 1-(4-methoxybenzyl) group of the 2-acylindole-3-carboxylic acid was performed by treatment with perchloric acid in acetic acid to afford 2-(3-bromoisonicotinoyl)indole, which was converted
1-苄基与 1-(4-甲氧基苄基)吲哚-2,3-二羧酸酐 和 (3-溴-4-吡啶基)三异丙氧基钛给出相应的2-酰基吲哚-3-羧酸作为唯一产物。通过将2-酰基亚吲哚-3-羧酸的1-(4-甲氧基苄基)基团脱保护,通过用高氯酸 在 醋酸 负担 2-(3-溴异烟酰胺基)吲哚,已转换为玫瑰树碱。