作者:Andrey Vorobiov、Pavel Gaponik、Petr Petrov、Oleg Ivashkevich
DOI:10.1055/s-2006-926403
日期:2006.4
A novel facile route for the introduction of 5-amino and 5-alkylamino substituents into 1-aryltetrazoles has been developed. A range of 5-amino-1-aryltetrazoles was obtained directly from the corresponding 1-aryltetrazoles in one pot by consecutive ring-opening, azidation and intramolecular cyclization. 5-Alkylamino-1-aryltetrazoles were formed by a similar mechanism from 1,4-disubstituted tetrazolium salts. An influence of the nature of aryl substituents and reaction conditions on the regioselectivity of the intramolecular cyclization of intermediate guanyl azides is revealed.
已开发出一种新颖简便的方法,将5-氨基和5-烷基氨基取代基引入到1-芳基四唑中。通过连续的开环、叠氮化和分子内环化反应,从相应的1-芳基四唑一锅获得了一系列5-氨基-1-芳基四唑。5-烷基氨基-1-芳基四唑是通过类似机制从1,4-二取代的四唑盐形成的。研究揭示了芳基取代基的性质和反应条件对中间体氨基叠氮盐分子内环化反应的区域选择性的影响。