A convenient two-step synthesis of 2-trichloromethyl-4-chloropyrimidines starting from 2-trichloromethyl-1,3-diazabutadienes is described. These nitrogen heterocycles were prepared in one pot synthesis by a sequential ...

A coupling reaction between cyclic N-acyliminium ions with organozinc reagents is described. The cyclic N-acyliminium ions, generated in situ from N-substituted-5-hydroxy-2-pyrrolidinones by treatment with BF3-etherate or ...