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Bismuth(III) bromide is an efficient catalyst for the one-pot multicomponent synthesis of polyhydroquinolines via the Hantzsch reaction. The mild reaction conditions, short reaction times, high yields and the remarkably low toxicity of bismuth compounds make this method especially attractive.

Iron(III) Tosylate Catalyzed Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones/ thiones via the Biginelli Reaction. -The title agent is an attractive catalyst for both aldehydes and acetals. Advantages are low cost, low toxicity, and ease of handling. -(STARCEVICH, J. T.; LAUGHLIN, T. J.; MOHAN*, R. S.; Tetrahedron Lett. 54 (2013) 8, 983-985, http://dx.

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