Rhodium-catalyzed hydroformylation in γ-valerolactone as a biomass-derived solvent
作者:Péter Pongrácz、Brigitta Bartal、László Kollár、László T. Mika
DOI:10.1016/j.jorganchem.2017.04.029
日期:2017.10
Rhodium-catalyzed hydroformylation of styrene, α-methylstyrene, dimethyl itaconate, and (R)-limonene was performed in gamma-valerolactone (GVL) as a proposed biomass-based environmentally benign solvent for hydroformylation referring to toluene as a generally used conventional solvent. Both achiral (triphenylphosphine, 1,3-bis(diphenylphoshino)propane) and enantiopure bidentate phosphine ligands ((S,S)-BDPP
苯乙烯,α-甲基苯乙烯,衣康酸二甲酯和(R)-柠檬烯的铑催化加氢甲酰化反应是在γ-戊内酯(GVL)中进行的,这是一种建议的基于生物质的环境友好型加氢甲酰化溶剂,是指甲苯为常用的常规溶剂。非手性(三苯基膦,1,3-双(二苯基膦)丙烷)和对映体纯净的二齿膦配体((S,S)-BDPP,(R)-BINAP,(R)-QUINAP,(R,R)-DIOP,(R c),(S p)-JOSIPHOS,(S)-SEGPHOS,(S)-(DM)-SEGPHOS)在原位生成的Rh-二膦催化剂体系。通常,催化剂在GVL中的活性低于甲苯。然而,在相同条件下,GVL的化学选择性(> 99%)和区域选择性(> 95%)都很高。BDPP改性的Rh催化剂连续三个循环使用。但是检测到其活性下降。