Phenylurethane compounds and methods for producing same, asymmetric urea compounds and methods for producing same, barbituric acid derivative, and diazo thermal recording material containing the derivative
申请人:FUJI PHOTO FILM CO., LTD.
公开号:US20020161225A1
公开(公告)日:2002-10-31
Phenylurethane compounds of the following general formula (1); asymmetric urea compounds of the following general formula (10) obtained from the phenylurethane compounds; barbituric acid derivatives of general formula (18) produced from the asymmetric urea compounds, which have specific substituents and are useful in diazo thermal recording materials; and diazo thermal recording materials containing the barbituric acid derivative.
1
Efficient Microwave-Assisted Synthesis of Ionic Esterified Amino Acids
作者:Ricardo Cerón-Camacho、Jorge Aburto、Luisa E. Montiel、Eugenio A. Flores、Frisia Cuellar、Rafael Martínez-Palou
DOI:10.3390/molecules16108733
日期:——
In this work, an efficient microwave-assisted methodology for the esterification of unprotected α-amino acids is described. Ionic esterified amino acids were synthesized in satisfactory yields in a facile one-pot solventless protocol from unprotected amino acids and alcohols under acid catalysis (MsOH or p-TsOH) to afford the pure products after a simple work-up procedure. This procedure can also be extended to the preparation of long and short chain alkyl and benzyl esters.