Iron Catalyzed Hydroformylation of Alkenes under Mild Conditions: Evidence of an Fe(II) Catalyzed Process
作者:Swechchha Pandey、K. Vipin Raj、Dinesh R. Shinde、Kumar Vanka、Varchaswal Kashyap、Sreekumar Kurungot、C. P. Vinod、Samir H. Chikkali
DOI:10.1021/jacs.8b01286
日期:2018.3.28
4-chloro styrene (S18), 4-vinylbenzonitrile (S19), 4-vinylbenzoic acid (S20), and allyl benzene (S21) to corresponding aldehydes in good to excellent yields. Both electron donating and electron withdrawing substituents could be tolerated and excellent conversions were obtained for S11-S20. Remarkably, the addition of 1 mol % acetic acid promotes the reaction to completion within 16-24 h. Detailed mechanistic
地球上储量丰富的第一排过渡金属为稀有和贵金属提供了一种廉价且可持续的替代品。然而,在催化中使用第一行金属需要苛刻的反应条件,活性有限,并且不能耐受官能团。这里报道的是一种在温和条件下高效铁催化的烯烃加氢甲酰化反应。该协议在低于 100 °C 的 10-30 bar 合成气压力下运行,利用现成的配体,并适用于一系列烯烃。因此,铁前体 [HFe(CO)4]-[Ph3PNPPh3]+ (1) 在三苯基膦存在下催化 1-己烯 (S2)、1-辛烯 (S1)、1-癸烯 (S3) 的加氢甲酰化, 1-十二烯 (S4), 1-十八烯 (S5), 三甲氧基(乙烯基)硅烷 (S6), 三甲基(乙烯基)硅烷 (S7), 腰果酚 (S8), 2,3-二氢呋喃 (S9), 烯丙基丙二酸(S10), 苯乙烯 (S11), 4-甲基苯乙烯 (S12), 4-异丁烯-苯乙烯 (S13), 4-丁丁-苯乙烯 (S14), 4-甲氧基苯乙烯