Iminophosphorane-mediated Synthesis of Fused [1,3,4] Thiadiazoles: Preparation of Imidazo[2,1-b][1,3,4]thiadiazoles and [1,3,4]Thiadiazolo[2,3-c][1,2,4]triazine Derivatives
Iminophosphorane-mediated Synthesis of Fused [1,3,4] Thiadiazoles: Preparation of Imidazo[2,1-b][1,3,4]thiadiazoles and [1,3,4]Thiadiazolo[2,3-c][1,2,4]triazine Derivatives