A Convenient Synthesis of Novel Series of 4-Cyclohexyl-2-substituted [1,2,4]Triazolo[1,5-a]quinazolin-5(4H)-ones. Novel Isomers of H1 Antihistaminic Activite Agents
作者:Ahmad Sami Shawali、Hamdi M. Hassaneen
DOI:10.3987/com-07-11311
日期:——
A novel series of 2,4-disubstituted-l,2,4-triazolo[l,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(4Η)-ones. The latter were prepared via new synthetic strategy based on 1,5-elecrocyclization of the respective N-(4-oxo-3-cyclohexylquinazolin-2-yl)nitrilimines.
通过 Dimroth 重排它们各自的异构体即 1,4-二取代[1 ,2,4]三唑并[4,3-a]-quinazolin-5(4Η)-ones。后者是通过基于各自 N-(4-oxo-3-cyclohexylquinazolin-2-yl) 腈亚胺的 1,5-电环化的新合成策略制备的。