[EN] PROCESS TO PREPARE EPSILON-CAPROLACTAM<br/>[FR] PROCÉDÉ POUR PRÉPARER DE L'EPSILON-CAPROLACTAME
申请人:UNIV LEIDEN
公开号:WO2014163506A1
公开(公告)日:2014-10-09
The invention is directed to a process to prepare ε-caprolactam and/or unsaturated ε-caprolactam from a pentenamide by contacting the pentenamide with a mixture of hydrogen and carbon monoxide in the presence of a solvent and a catalyst system comprising of a Group 8-10 metal and a phosphorus-donor ligand. The ligand may be a xantphos-type ligand.
Rhodium-catalyzed hydrogenation of olefins in γ-valerolactone-based ionic liquids
作者:Andrea Strádi、Márk Molnár、Mihály Óvári、Gábor Dibó、Frank U. Richter、László T. Mika
DOI:10.1039/c3gc40360b
日期:——
γ-Valerolactone-based ionic liquids were successfully used as the catalyst phase for [Rh(cod)2][BF4]/RP(C6H4-m-SO3Na)2 (R = Me, Pr, Bu, Cp) catalyzed hydrogenation of different olefins. Compared to broadly used ionic liquids e.g. 1-butyl-3-methylimidazolium chloride [bmim][Cl], the turnover frequencies were significantly higher and the reaction was selective for the CC double bonds in the presence of carbonyl, cyano, and phenyl groups. The catalyst was recycled for ten consecutive runs under regular or biphasic conditions without loss of activity. The vapour pressure and viscosity of γ-valerolactone-based ionic liquids were determined as well.
基于γ-戊内酯的离子液体成功作为催化相,用于催化[Rh(cod)2][BF4]/RP(C6H4-m-SO3Na)2 (R = Me, Pr, Bu, Cp)的不同比烯烃的氢化反应。与广泛使用的离子液体,如1-丁基-3-甲基咪唑氯化物[bmim][Cl]相比,反应的转换频率显著更高,并且在存在羰基、氰基和苯基的情况下,对碳碳双键具有选择性。催化剂在常规或双相条件下连续回收使用了十次,未出现活性损失。同时,γ-戊内酯基离子液体的蒸汽压和粘度也得到了测定。
Methyl 4-methoxypentanoate: a novel and potential downstream chemical of biomass derived gamma-valerolactone
作者:Zheng Li、Yetao Jiang、Xing Tang、Miao Zuo、Xianhai Zeng、Yong Sun、Lu Lin
DOI:10.1039/c4ra13682a
日期:——
A potential biofuel and solvent, methyl 4-methoxypentanoate, was effectively prepared from biomass derived GVL and methanol by the catalysis of HUSY and CaCO3.
1-Alkoxyalkyl radicals [R1R2(OR3)C·], which were generated from 1-alkoxy-1-(phenylseleno)alkanes [R1R2C(OR3)SePh] and n-Bu3SnH in the precence of AIBN, participate effectively in intermolecular add...
Green nylons! Acidic ionic‐liquid catalysis for the transformation of γ‐valerolactone into methyl 3‐pentenoate (M3P) is shown to be performed efficientlyundermildconditions. M3P is obtained selectively from a reaction at 170 °C for 3.5 h in the presence of an acidic ionicliquid that has a low vapor pressure, high thermal stability, and excellent catalytic performance. A possible reaction pathway