A Shorter Synthesis of Dithienopyridines Through Pd(0)-Catalyzed Coupling of 2-(2-Trimethylstannyl-3-thienyl)-1,3-dioxolane with tert-Butyl N-(ortho-Halothienyl)carbamates

Article abstract of DOI:10.1055/s-1989-27172

Less sterically crowded 2-(2-trimethylstannyl-3-thienyl)-1,3-dioxolane (4) was prepared and coupled with tert-butyl N-(ortho-halothienyl)carbamates, catalyzed by Pd(0) complex, to give dithieno<3,2-b;2',3'-d>pyridine (5), dithieno<3,4-b;2',3'-d>pyridine (6), and dithieno<2,3-b;2',3'-d>pyridine (7) in good yields.