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Synthesis of novel 2-alkoxy(aralkoxy)-4H-[1,2,4]triazolo[1,5-a]quinazolin-5-ones starting with dialkyl-N-cyanoimidocarbonates

โœ Scribed by Rashad Al-Salahi; Detlef Geffken

Publisher
Journal of Heterocyclic Chemistry
Year
2011
Tongue
English
Weight
136 KB
Volume
48
Category
Article
ISSN
0022-152X

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โœฆ Synopsis

Abstract

A novel series of 2โ€alkoxy(aralkoxy)โ€4__H__โ€[1,2,4]triazolo[1,5โ€a]quinazolines were synthesized employing __Nโ€__cyanoimidocarbonates and 2โ€hydrazinobenzoic acid as building blocks. Chemical transformation of the inherent lactam moiety in the targeted 2โ€alkoxy(aralkoxy)[1,2,4]triazolo[1,5โ€a]quinazolines was offered access to a variety of derivatives. J. Heterocyclic Chem., (2011).

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## Abstract magnified image A novel series of 2,4โ€disubstitutedโ€1,2,4โ€triazolo[1,5โ€__a__]quinazolinโ€5(4__H__)โ€ones were prepared by Dimroth rearrangement of their respective isomers namely 1,4โ€disubstitutedโ€[1,2,4]triazolo[4,3โ€__a__]โ€quinazolinโ€5(4__H__)โ€ones. The latter were prepared __via__ new