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.
Ritter reactions of alcohols and tert-butyl acetate with various nitriles were performed using iodine as a mild and effective catalyst under heating conditions to afford the corresponding amides in good to excellent yields.