A new route towards dithienoquinazoline and benzo[f]thieno[3,2-h]quinazoline systems using Pd-catalyzed intramolecular cyclization under microwave irradiation
作者:Egor V. Verbitskiy、Gennady L. Rusinov、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.3998/ark.5550190.p009.623
日期:——
A novel synthetic route to novel thienoacene systems bearing a fused pyrimidine ring is proposed. The commercially available 5-bromopyrimidine is used as the starting material to obtain various dithienoquinazoline and benzo[f]thieno[3,2-h]quinazoline systems through the Suzuki crosscoupling, nucleophilic aromatic substitution of hydrogen (the SNH reaction), and finally palladiumcatalyzed intramolecular