光照下钴镍盐催化肉桂醛的转移加氢反应

Transfer hydrogenation of cinnamaldehyde catalyzed by cobalt and nickel salts under illumination

以甲醇为氢源,研究了光照下金属镍盐、钴盐催化肉桂醛的转移加氢反应.结果表明,以Co(OAc)2和Ni(OAc)2为催化剂,肉桂醛可以发生催化转移加氢反应,得到肉桂醇;就催化剂的转移加氢活性和产物肉桂醇的选择性而言,Co(OAc)2的催化效果更好.与此同时,在反应体系中添加NaOAc和Na2C2O4等碱性添加剂可提高肉桂醛催化转移加氢反应的活性和选择性;而短波长的光有利于肉桂醛转移加氢反应的进行.

The transfer hydrogenation of cinnamaldehyde catalyzed by cobalt and nickel salts under illumination was investigated using methanol as the hydrogen donor.Results indicated that cinnamaldehyde was transformed to cinnamyl alcohol via transfer hydrogenation in the presence of Co（OAc）2 and Ni（OAc）2 as the catalysts.Co（OAc）2 had better catalytic performance in terms of octane yield and selectivity.In the meantime,introducing alkali additives such as NaOAc and Na2C2O4 could promote the catalyzed transfer hydrogenation of cinnamaldehyde,and light with a short wavelength was beneficial to the hydrogenation of cinnamaldehyde.