An efficient and inexpensive synthesis of N-substituted amides from the Ritter reaction of nitriles with esters catalyzed by Fe(ClO4)3·H2O is described. Fe(ClO4)3·H2O is an economically efficient catalyst for the Ritter reaction under solvent-free conditions. Reactions of a range of esters (benzyl, sec-alkyl, and tert-butyl esters) with nitriles (primary, secondary, tertiary, and aryl nitriles) were
Palladium-Catalyzed Amidation of N-Tosylhydrazones with Isocyanides
作者:Fengtao Zhou、Ke Ding、Qian Cai
DOI:10.1002/chem.201102459
日期:2011.10.24
N‐tosylhydrazones: The direct formation of keteniminesfromcarbenes and isocyanides is limited to the reaction of Fischer carbene complexes or some specially stabilized carbenes with isocyanides. A Pd‐catalyzed amidation of N‐tosylhydrazones with isocyanides via a ketenimine intermediate in the presence of water is described. The method offers a general way to synthesize amides from carbonyl compounds through one‐carbon
An efficient synthesis of N-tert-butyl amides by the reaction of tert-butyl benzoate with nitriles catalyzed by Zn(ClO4)2·6H2O
作者:Cheng-Liang Feng、Bin Yan、Min Zhang、Jun-Qing Chen、Min Ji
DOI:10.1007/s11696-018-0586-4
日期:2019.2
synthesis of N-tert-butyl amides from the reaction of nitriles (aryl, benzyl and sec-alkyl nitriles) with tert-butyl benzoate catalyzed by the employment of 2 mol% Zn(ClO4)2·6H2O at 50 °C under the solvent-free conditions is described. The reaction with aryl nitriles was carried out well and afforded the N-tert-butyl amides in 87–97% yields after 1 h. The benzyl and sec-alkyl nitriles also proceeded well
A convenient synthesis of <i>N</i>-<i>tert</i>-butyl amides by the reaction of di-<i>tert</i>-butyl dicarbonate and nitriles catalyzed by Cu(OTf)<sub>2</sub>
utility of Cu(OTf)2 as the catalyst for the synthesis of a series of N-tert-butyl amides in excellent isolated yields via the reaction of nitriles (alkyl, aryl, benzyl, and furyl nitriles) with di-tert-butyl dicarbonate is described. Cu(OTf)2 is a highly stable and efficient catalyst for the present Ritter reaction undersolvent-freeconditions at roomtemperature.
ACE-2 modulating compounds and methods of use thereof
申请人:——
公开号:US20040082496A1
公开(公告)日:2004-04-29
ACE-2 modulating compounds for the treatment of body weight disorders are disclosed. Methods of using the compounds and pharmaceutical compositions containing the compounds are also claimed.