Sodium Dithionite-Initiated Coupling of 1-Bromo-1-chloro-2,2,2-trifluoroethane with Pyrroles: A New, Convenient and Economical Synthesis of 5-(Trifluoromethyl)dipyrromethanes - Dmowski, Wojciech; Piasecka-Maciejewska, Krystyna; Urbańczyk-Lipkowska, Zofia (Synthesis, 2003)