64820-66-2Relevant articles and documents
Ureas in Organic Synthesis. XII. Syntesis of 2-Amino-5-chlorobenzhydrylureas and Their Heterocyclization
Bakibaev,Shtrykova,Vostretsov
, p. 457 - 459 (2007/10/03)
A synthetic method was developed for hard-to-get biologically active 2-amino-5-chlorobenzhydrylureas based on reaction of the corresponding benzhydrols with urea in sulfuric acid. The 2-amino-5-chlorobenzhydrylureas were shown to easily undergo on heating cyclization to 1-R-1,2,3,4-tetrahydro-4-phenyl-chloroquinazolin-2-ones.
SYNTHESIS OF QUINAZOLINES
Bergman, Jan,Brynolf, Anna,Elman, Bjoern,Vuorinen, Eino
, p. 3697 - 3706 (2007/10/02)
Grignard reagents reacted with 2-aminobenzonitrile to give the intermediate (10), which readily could be cyclized to quinazolines by reaction with carbonyl compounds (e.g. acid chlorides, anhydrides, formates and oxalates).The intermediate (10) and aldehy