Asymmetric synthesis of 3-hydroxyl-2-alkanones is achieved via one-pot, tandem organocatalytic aminoxylation of aldehydes and chemoselective CH2N2-induced homologation. Accelerating effect of water is observed in α-aminoxylation. MgCl2, a Lewis acid additive, improves the chemoselectivity of the diazomethane homologation to 6:1 in favor of ketone.
3-羟基-2-链烷酮的不对称合成是通过醛的一锅,串联有机催化氨氧化和化学选择性CH 2 N 2诱导的同系物实现的。在α-氨氧基化中观察到水的加速作用。路易斯酸添加剂MgCl 2将重氮甲烷同系物的化学选择性提高到6:1(有利于酮)。