Hua Li, Hong-yao Zeng, Hua-wu Shao
Bismuth(III) chloride-catalyzed one-pot Mannich reaction: three-component synthesis of β-amino carbonyl compounds
Tetrahedron Letters
Volume 50, Issue 49, 9 December 2009, Pages 6858-6860
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http://dx.doi.org/10.1016/j.tetlet.2009.09.131