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.
Synthesis of 3-Indolylarylmethanamides by Samarium Triiodide Catalyzed Friedel-Crafts Amidoalkylation
作者:Xiaoxia Wang、Hui Mao、Wencun Wang、Liang He、Lichun Kong、Junhua Liu
DOI:10.1055/s-2008-1067192
日期:2008.8
The amidoalkylation of indoles with N-(α-benzotriazol-1-ylalkyl)amides was smoothly realized with samarium triiodide as a catalyst to give a series of novel 3-indolyl arylmethanamides with good yields and selectivities.
Enantioselective ethylation of N-(amidobenzyl)benzotriazoles catalysed by chiral aminoalcohols
作者:Alan.R. Katritzky、Philip A. Harris
DOI:10.1016/s0957-4166(00)80287-6
日期:1992.1
In the presence of the chiral amino-alcohol (-) N,N-dibutylnorephedrine (DBNE), N-(amidobenzyl)benzotriazoles react with diethylzinc to give the corresponding amides with up to 76% ee.