Highly efficient esterification of alcohols with acetic acid by using a Brønsted acidic ionic liquid,i.e.,1-methyl-2-pyrrolidonium hydrogen sulfate([Hnmp]HSO_(4)),as catalyst has been realized.The turnover number...Highly efficient esterification of alcohols with acetic acid by using a Brønsted acidic ionic liquid,i.e.,1-methyl-2-pyrrolidonium hydrogen sulfate([Hnmp]HSO_(4)),as catalyst has been realized.The turnover numbers(TON)were able to reach up to 11000 and turnover frequency(TOF)was 846.The catalytic system is suitable for the esterification of long chain aliphatic alcohols,benzyl alcohol and cyclohexanol with good yields of esters.The procedure of separating the product and catalyst is simple,and the catalyst could be reused.[Hnmp]HSO_(4) had much weaker corrosiveness than H_(2)SO_(4).The corrosive rate of H_(2)SO_(4) was 400 times more than that of[Hnmp]HSO_(4) to stainless steel.展开更多
基金This work was financially supported by the National Natural Science Foundation of China(Grant No.20376015)Guangdong Provincial Natural Science Foundation(32491)the Foundation of Scientific and technological Planning Project of Guangzhou of China(2004J1-C0151).
文摘Highly efficient esterification of alcohols with acetic acid by using a Brønsted acidic ionic liquid,i.e.,1-methyl-2-pyrrolidonium hydrogen sulfate([Hnmp]HSO_(4)),as catalyst has been realized.The turnover numbers(TON)were able to reach up to 11000 and turnover frequency(TOF)was 846.The catalytic system is suitable for the esterification of long chain aliphatic alcohols,benzyl alcohol and cyclohexanol with good yields of esters.The procedure of separating the product and catalyst is simple,and the catalyst could be reused.[Hnmp]HSO_(4) had much weaker corrosiveness than H_(2)SO_(4).The corrosive rate of H_(2)SO_(4) was 400 times more than that of[Hnmp]HSO_(4) to stainless steel.
