The β-amino carbonyl functionality is not only a segment of biologically active natural products but also serves as key intermediate for synthesis of important nitrogen-containing compounds such as β-amino acids, β-lactams, and β-amino alcohols [1–6]. Over the past few decades, synthesis of β-amino carbonyl compounds has become a field of increasing interest in organic synthesis [7, 8]. Mannich-type reaction is one of the classical and powerful methods for construction ...
