有机化学 ›› 2021, Vol. 41 ›› Issue (9): 3571-3577.DOI: 10.6023/cjoc202104025 上一篇    下一篇

研究论文

新型铱配合物催化水作氢源的氢甲酰化反应

刘欢, 林旭锋*(), 杨妲*()   

  1. 中国石油大学(华东)理学院化学系 山东青岛 266580
  • 收稿日期:2021-04-12 修回日期:2021-05-25 发布日期:2021-07-12
  • 通讯作者: 林旭锋, 杨妲
  • 基金资助:
    国家自然科学基金(21576291); 山东省自然科学基金(ZR2014BM002); 中国博士后科学基金(2019M662460); 青岛市博士后基金(05TB2010001); 自主创新科研计划(20CX06032A)

Novel Ir-Complexes for Hydroformylation of Olefins with H2O as the Hydrogen Source

Huan Liu, Xufeng Lin(), Da Yang()   

  1. Department of Chemistry, College of Science, China University of Petroleum, Qingdao, Shandong 266580
  • Received:2021-04-12 Revised:2021-05-25 Published:2021-07-12
  • Contact: Xufeng Lin, Da Yang
  • Supported by:
    National Natural Science Foundation of China(21576291); Natural Science Foundation of Shandong Province(ZR2014BM002); China Postdoctoral Science Foundation(2019M662460); Postdoctoral Applied Research Project of Qingdao City(05TB2010001); Fundamental Research Funds for the Central Universities(20CX06032A)

基于不同电子和空间效应的膦配体L1~L4, 合成了一系列新型铱配合物Ir-L1~Ir-L4, 考察了配体在铱配合物催化水作氢源的氢甲酰化反应中的影响. 研究表明, 具有较强π-受电子能力的离子型双齿膦配体L4 (1J31P-77Se =781 Hz)修饰的铱配合物可以同时促进水煤气变换反应和烯烃氢甲酰化反应: 以Ir-L4配合物为催化剂, 1-己烯的转化率高达93%, 产物醛(直链醛和支链醛)的收率为93%, 1-己烯加氢副产物己烷的收率小于1%, 表明水作氢源几乎完全抑制了烯烃加氢副反应. 此外, Ir-L4催化体系结合离子液体([MePh3P]Br)还可实现催化剂的回收循环5次.

关键词: 离子型膦配体, 铱配合物, 氢甲酰化反应, 水煤气变换反应

A series of novel Ir-complexes, namely Ir-L1, Ir-L2, Ir-L3 and Ir-L4, where L1~L4 represent phosphine ligands having different electronic and steric effects, were synthesized in this work. Then the effect of the as-synthesized phosphine ligands on the performance of the Ir(I)-complexes catalysts was investigated for the hydroformylation reaction using H2O as the hydrogen source. It was found that the Ir-complex modified by the ionic bi-dentate phosphines L4 with a strong π-accepting ability (1J31P-77Se =781 Hz) can effectively promote water gas shift reaction (WGSR) and hydroformylation of olefins at the same time. As a result, a 1-hexene conversion of 93% was obtained, and the total yields of the target (linear and branched) aldehydes were up to 93% when using the Ir-L4 catalyst. Meanwhile, the yield of hexane from the hydrogenation of 1-hexene was less than 1%, showing that the side reaction of olefin hydrogenation can be almost completely inhibited when using H2O as the hydrogen source. Moreover, by using the ionic liquid of [MePh3P]Br as the solvent, Ir-L4 catalyst can be efficiently recovered for at least 5 times.

Key words: ionic phosphines, iridium complexes, hydroformylation, water gas shift reaction