芳香醛与盐酸羟胺在 90℃反应 ,以 Cu SO4催化选择性得到肟的 E型异构体 ,12例转化率 70 %～ 95 % ;若以 K2 CO3催化 ,芳香醛或酮在同样条件则得到 Z型肟 ,18例转化率为80 %～ 90 %肟的E和Z型异构体的选择性合成@贺宝元 Aromatic aldehydes reacted with hydroxylamine hydrochloride at 90 ℃, and the E-isomers of oxime were obtained with Cu SO4 selectivity. The conversion rate was 70% ~ 95% in 12 cases. When catalyzed by K2CO3, the aromatic aldehydes or ketones were obtained under the same conditions Selective Synthesis of Z-Type Oximes and 18 E and Z Isomers with 18% Conversion of Oxime @ He Baoyuan