Heterocycles p. 2693 - 2703 (2005)
Update date:2022-08-04
Topics:
Miki, Yasuyoshi
Aoki, Yoshiyuki
Tsuzaki, Yasuhiko
Umemoto, Misako
Hibino, Hajime
Reaction of 1-benzylindole-2,3-dicarboxylic anhydride with 2,4,6-trimethoxypyridine in the presence of a Lewis acid gave 1-benzyl-3-(2,4,6-trimethoxynicotinoyl)indole-2-carboxylic acid as the sole product in high yield, which could be changed to 1-benzyl-3-(2,4,6-trimethynicotinoyl)indole. 1-Benzyl-3-(2,4,6-trimethoxynicotinoyl)indole was converted to 3-methoxyellipticine and ellipticine by selective demethylation and triflation of the methoxy group.
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(2006)