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。