Amidations Using N,N‘-Carbonyldiimidazole: Remarkable Rate Enhancement by Carbon Dioxide
摘要:
Carbon dioxide catalyzes the reaction of imidazolides with amines to form amides. A substantial rate enhancement is observed in the presence Of CO2 compared to the CO2-free case. The scope and limitations of this reaction are discussed.
DOI:
10.1021/jo049949k
作为产物:
描述:
2,4-二甲基吡咯-3-羧酸 、 N,N'-羰基二咪唑 在
乙腈 作用下,
以
四氢呋喃 为溶剂,
反应 3.0h,
以to afford 7.28 g (77%) of the product的产率得到3-(1H-imidazol-1-ylcarbonyl)-2,4-dimethyl-1H-pyrrole
The invention provides a method of preparing a compound of formula 2
wherein R
1
and R
6
are as defined herein, by a catalytic amidation process in the presence of added carbon dioxide. The inventive methods show surprising rate enhancement relative to the corresponding uncatalyzed reaction.
[EN] METHOD FOR CATALYZING AMIDATION REACTIONS BY THE PRESENCE OF CO2<br/>[FR] METHODE DE CATALYSE DE REACTIONS D'AMIDATION AU MOYEN DE CO2
申请人:PHARMACIA & UPJOHN CO LLC
公开号:WO2005023765A1
公开(公告)日:2005-03-17
The invention provides a method of preparing a compound of formula (2), wherein R1 and R6 are as defined herein, by a catalytic amidation process in the presence of added carbon dioxide. The inventive methods show surprising rate enhancement relative to the corresponding uncatalyzed reaction.
Amidations Using <i>N</i>,<i>N</i> <i>‘</i>-Carbonyldiimidazole: Remarkable Rate Enhancement by Carbon Dioxide
作者:Rajappa Vaidyanathan、Vikram G. Kalthod、Duc P. Ngo、Jerad M. Manley、Sean P. Lapekas
DOI:10.1021/jo049949k
日期:2004.4.1
Carbon dioxide catalyzes the reaction of imidazolides with amines to form amides. A substantial rate enhancement is observed in the presence Of CO2 compared to the CO2-free case. The scope and limitations of this reaction are discussed.