A variety of 3-substituted indoles are prepared from 1-methyl-3-(benzotriazol-1-ylalkyl)indoles (1), which are readily available either from the condensation of 3-methylindole with N-(benzotriazol-1-ylalkyl)carbamates or from the alkylation and silylation of lithiated 1-methyl-3-(benzotriazol-1-ylmethyl)indole (2).
Convenient novel syntheses of 1,1-bis(heteroaryl)alkanes
摘要:
A variety of symmetrical 1,1-bis(heteroaryl)alkanes are prepared in excellent yields from the reaction of N-(alpha-benzotriazolylalkyl)carbamate 2 (itself easily available from the condensation of benzotriazole, an aldehyde, and an alkyl carbamate) with an excess of 2-methylthiophene or 2-methylfuran. When methyl N-(alpha-benzotriazolylalkyl)carbamate 2a is treated with 1 equiv of a heterocycle, the benzo-triazolylalkyl-substituted heterocycle is formed. These intermediates react further with other heterocycles to give unsymmetrical 1, 1-bis(heteroaryl)alkanes in good yields under mild conditions.
Convenient novel syntheses of 1,1-bis(heteroaryl)alkanes
作者:Alan R. Katritzky、Linghong Xie、Wei Qiang Fan
DOI:10.1021/jo00068a036
日期:1993.7
A variety of symmetrical 1,1-bis(heteroaryl)alkanes are prepared in excellent yields from the reaction of N-(alpha-benzotriazolylalkyl)carbamate 2 (itself easily available from the condensation of benzotriazole, an aldehyde, and an alkyl carbamate) with an excess of 2-methylthiophene or 2-methylfuran. When methyl N-(alpha-benzotriazolylalkyl)carbamate 2a is treated with 1 equiv of a heterocycle, the benzo-triazolylalkyl-substituted heterocycle is formed. These intermediates react further with other heterocycles to give unsymmetrical 1, 1-bis(heteroaryl)alkanes in good yields under mild conditions.
A Versatile Synthesis of 3-Substituted Indoles
作者:Alan R. Katritzky、Linghong Xie、Darren Cundy
DOI:10.1080/00397919508011388
日期:1995.2
A variety of 3-substituted indoles are prepared from 1-methyl-3-(benzotriazol-1-ylalkyl)indoles (1), which are readily available either from the condensation of 3-methylindole with N-(benzotriazol-1-ylalkyl)carbamates or from the alkylation and silylation of lithiated 1-methyl-3-(benzotriazol-1-ylmethyl)indole (2).