手性二胺修饰的Ru-TPP/γ-Al_2O_3催化苄叉丙酮不对称加氢反应  被引量:5

Asymmetric Hydrogenation of Benzalacetone Catalyzed by Chiral Diamine-Modified Ru-TPP/γ-Al_2O_3

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作  者:明方永[1] 王金波[1] 付海燕[1] 陈骏[1] 陈华[1] 李贤均[1] 

机构地区:[1]四川大学化学学院有机金属络合催化研究所绿色化学与技术教育部重点实验室,四川成都610064

出  处:《催化学报》2007年第12期1057-1061,共5页

基  金:国家自然科学基金(20272037)

摘  要:在温和条件下制备了三苯基膦(TPP)作保护剂的负载钌催化剂Ru-TPP/γ-Al2O3,以(1S,2S)-1,2-二苯基乙二胺,(S)-1,1-二(对甲氧苯基)-2-异丙基乙二胺,(8S,9S)-9-氨基(9-脱氧)二氢辛可尼定和(1S,2S)-环己二胺为手性修饰剂,考察了Ru-TPP/γ-Al2O3在苄叉丙酮不对称加氢反应中的催化性能.结果表明,以(1S,2S)-1,2-二苯基乙二胺作为修饰剂时,催化剂具有较高的活性和选择性.在有K2CO3存在的异丙醇和水的混合溶液中,在氢气压力4MPa,40℃和8h的条件下,苄叉丙酮的转化率达到了99%,对羰基加氢的选择性大于98%,不饱和醇的光学纯度ee值为47%.The enantioselective hydrogenation of benzalacetone was catalyzed by chiral diamine-modified Ru-TPP/γ-Al2O3 (TPP = triphenylphosphine), and the effect of chiral diamines, such as ( 1 S, 2 S )-DPEN ( (1 S, 2 S ) - 1,2-diphenyl- 1,2-ethylenediamine), ( S ) - 1,1 - di ( 4-anisyl ) -2-isopropyl- 1,2-et hylenediamine, ( 8 S, 9 S ) -9- amino (9-deoxy) dihydrocinchonidine, and ( 1 S, 2 S )- 1,2-diaminocyclohexane on the hydrogenation was investigated. The results showed that (1 S,2 S )-DPEN could efficiently improve the hydrogenation activity and the selectivity for benzalacetone. Under the optimum reaction conditions of 40℃, H2 pressure of 4.0 MPa in K2CO3/i-PrOH + H2O solution, and (1 S ,2S)-DPEN as the chiral modifier, the conversion and the selectivity for the unsaturated alcohol reached 99 % and 98 %, respectively, and the ee value of the unsaturated alcohol was up to 47 %.

关 键 词:苄叉丙酮 负载钌催化剂 于性二胺 不对称加氢 不饱和醇 

分 类 号:O643.32[理学—物理化学]

 

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