水溶性钌-膦配合物催化肉桂醛和4-苯基-3-丁烯-2-酮的选择加氢  

SELECTIVE HYDROGENATION OF CINNAMALDEHYDE ANDBENZYLIDENEACETONE CATALYZED BY WATERSOLUBLE RuTPPTS COMPLEXES

作　　者：胡家元[1] 陈华[1] 王祥智[1] 李贤均[1] 田金忠[2] 黄宁表[2] 

机构地区：[1]四川大学化学系络合催化研究室 [2]香港城市大学生物及化学系

出　　处：《催化学报》1998年第3期280-283,共4页

摘　　要：水溶性钌┐膦配合物催化肉桂醛和４┐苯基┐３┐丁烯┐２┐酮的选择加氢胡家元陈华王祥智李贤均＊（四川大学化学系络合催化研究室，成都６１００６４）田金忠黄宁表（香港城市大学生物及化学系，香港九龙）关键词钌配合物，肉桂醛，苯丁烯酮，选择加氢分类号Ｏ６４３／Ｏ...The selective hydrogenation of cinnamaldehyde and benzylideneacetone catalyzed by RhCl3TPPTS and RuCl2(TPPTS)3 in biphase catalytic system (aqueous/organic phase) was studied. The carbonyl group in cinnamaldehyde was hydrogenated and the selectivity for forming cinnamic alcohol was about 96%. However, the hydrogenation of benzylideneacetone occurred in the carboncarbon double bond, and the selectivity for forming benzyl acetone was about 98%. The influence of TPPTS concentration on the reactions showed that when n(TPPTS)/n(Ru) was lower than 3 the conversion in both hydrogenation reactions increased rapidly with increasing TPPTS concentration. When n(TPPTS)/n(Ru) was higher than 3, the increase of the conversion in cinnamaldehyde hydrogenation became very slow, however, the conversion of benzylideneacetone hydrogenation decreased. The addition of CTAB (C16H33NMe3Br) into the solution promoted the cinnamaldehyde hydrogenation, but slowed down the benzylideneacetone hydrogenation. The different catalytic behavior of two ruthenium catalyst precursors exhibited in the hydrogenation. The activity of the catalyst prepared in situ from n(TPPTS)/n(RuCl3)=3 was obvious higher than that of RuCl2(TPPTS)3 in cinnamaldehyde hydrogenation. However the activity of RuCl2(TPPTS)3 was higher than n(TPPTS)/n(RuCl3)=3 in benzylideneacetone hydrogenation. The results suggested that both substrates were sensitive to the reaction microcircumstances and the mechanisms were probably different.

关 键 词：肉桂醛 加氢 苯基丁烯酮 催化剂 钌膦配合物 

分 类 号：O643.36[理学—物理化学] O621.254.2[理学—化学]