Continuous microflow visible-light photocatalytic N-formylation of piperidine and its kinetic study  

作　　者：Yangyang Xu Fang Zhao Xuhong Guo 

机构地区：[1]State Key Laboratory of Chemical Engineering,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China [2]International Joint Research Center of Green Energy Chemical Engineering,Shanghai 200237,China

出　　处：《Chinese Chemical Letters》2024年第1期285-289,共5页中国化学快报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(No.21808059);the Fundamental Research Funds for the Central Universities(No.JKA01221712).

摘　　要：N-formylation of amines,a class of synthetically important reactions,is typically conducted using metal catalysts that are relatively expensive or not readily available and usually needs harsh conditions to increase the reaction efficiency.Here,an efficient continuous microflow strategy was developed for the gas-liquid visible-light photocatalytic N-formylation of piperidine,which achieved a reaction yield of 82.97%and a selectivity of>99%at 12 min using cheap organic dye photocatalyst under mild reaction conditions.The influence of essential parameters,including light intensity,temperature and equivalents of the gas,additive and photocatalyst,on the reaction yield was systematically studied.Furthermore,kinetic investigations were conducted,exhibiting the dependence of reaction rate and equilibrium yield of N-formylpiperidine on light intensity,temperature and photocatalyst equivalent.The microflow photocatalytic approach established in this work,which realized a markedly higher space-time yield than the conventional batch method(37.9 vs.0.212 mmol h-1 L-1),paves the way for the continuous,green and efficient synthesis of N-formamides.

关 键 词：MICROFLOW Visible-light photocatalysis N-FORMYLATION PIPERIDINE KINETICS 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]