Fragmentation pattern of amides by EI and HRESI: study of protonation sites using DFT-3LYP data
作者:H. H. Fokoue、J. V. Marques、M. V. Correia、L. F. Yamaguchi、X. Qu、J. Aires-de-Sousa、M. T. Scotti、N. P. Lopes、M. J. Kato
DOI:10.1039/c7ra00408g
日期:——
both types of massspectrometric analysis in order to identify structural features influencing fragmentation. Most of the amides showed an intense signal of the protonated molecule [M + H]+ when subjected to both HRESI-MS and EI-MS conditions, with a common outcome being the cleavage of the amide bond (N–CO). This results in the loss of the neutral amine or lactam and the formation of aryl acylium cations