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.
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.
Selective substitution reactions of methoxycarbonylamino-1-(1-benzotriazolyl)alkanes with active methylene compounds
作者:Liejin Zhou、Xin Lv、Hui Mao、Xiaoxia Wang
DOI:10.1002/jhet.612
日期:2011.3
Benzotriazole adducts methoxycarbonylamino‐1‐(1‐benzotriazolyl)alkanes 1 were derived from the condensation of an aldehyde, benzotriazole, and methylcarbamate. The leaving tendency of methoxycarbonylamino group (MeOCONH) and benzotriazole group (Bt) was investigated by treatment of the adducts with activemethylenecompounds under either Lewis acid‐catalyzed or basic conditions. In the presence of