Enantioselective Synthesis of Polysubstituted 4-Aminobenzopyrans

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Catalytic Asymmetric Aza-Michael−Michael Addition Cascade: Enantioselective Synthesis of Polysubstituted 4-Aminobenzopyrans
Xu-Fan Wang, Jing An, Xiao-Xiao Zhang, Fen Tan, Jia-Rong Chen, and Wen-Jing Xiao