Synthesis of Benzoxazines, 3,4-Dihydroquinazolines and Quinazolinethiones
摘要:
Reaction of aldehydes, ketones, imines and isothiocyanates with N-(2-bromophenyl) ethylimidates la in presence of lithium, is considered as an original route to 4H-3, 1-benzoxazines, 3,4-dihydroquinazolines and 4(3H)-quinazolinethiones.
Synthesis of Heterocyclic Skeletons by the Reaction of N1-(2-Cyanophenyl)-benzimidoyl Chloride with Thioamides
作者:Walid Fathalla、Pavel Pazdera
DOI:10.3390/70100096
日期:——
The reaction of N-(2-cyanophenyl)benzimidoyl chloride with reagents containing a thioamide moiety, i.e. thioacetamide, benzylthiourea, symmetrical dialkyl- and diarylthioureas gave different cyclic products: 3,1-benzothiazine, 1,3,5-benzotriazocine and quinazoline. The reaction pathways of prepared compounds are discussed.