A new convenient synthesis of 2,4-disubstituted-1,2,4-triazolo[1,5-<i>a</i>] quinazolin-5(4<i>H</i>)-ones
作者:Ahmad S. Shawali、Hamdi M. Hassaneen、Nabil Kh. Shurrab
DOI:10.1002/jhet.5570450642
日期:2008.11
A novel series of 2,4-disubstituted-1,2,4-triazolo[1,5-a]quinazolin-5(4H)-ones were prepared by Dimroth rearrangement of their respective isomers namely 1,4-disubstituted-[1,2,4]triazolo[4,3-a]-quinazolin-5(4H)-ones. The latter were prepared via new synthetic strategy based on 1,5-elecrocyclization of the respective N-(4-oxo-3-phenylquinazolin-2-yl)nitrilimines.
通过Dimroth重排它们各自的异构体即1,4-二取代-[[ ] ,制备了一系列新的2,4-二取代-1,2,4-三唑并[1,5- a ]喹唑啉-5(4 H)-酮。 1,2,4]三唑并[4,3 - a ]-喹唑啉-5(4 H)-ones。后者通过基于各自的N-(4-氧代-3-苯基喹唑啉-2-基)硝苯胺的1,5-电子环化的新合成策略制备。