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一些具有螺旋结构的环状酯的电子轰击碎裂机理

Electron impact fragmentation mechanisms of some cyclic esters with helical structures.

作者信息

He J, Nie A, He M, He X, Yu Z, Ye X, Xing Q

机构信息

Department of Chemistry, Peking University, Beijing 100871, China.

出版信息

Rapid Commun Mass Spectrom. 2000;14(24):2357-61. doi: 10.1002/1097-0231(20001230)14:24<2357::AID-RCM168>3.0.CO;2-2.

DOI:10.1002/1097-0231(20001230)14:24<2357::AID-RCM168>3.0.CO;2-2
PMID:11114050
Abstract

The electron impact mass spectra of several cyclic esters with helical structures have been studied. Their fragmentation pathways were proposed and confirmed by mass-analyzed ion kinetic energy (MIKE) and high-resolution data. In general, the dominant fragmentation pathways in the spectra of these compounds originate from a alpha-cleavage with loss of a hydrogen or methyl group. The difference between hydrogen and methyl group loss greatly affects the subsequent fragmentations. Although, due to their helicity, these cyclic esters are optically active no stereo-related fragmentation pathway was observed. Copyright 2000 John Wiley & Sons, Ltd.

摘要

对几种具有螺旋结构的环状酯的电子轰击质谱进行了研究。通过质量分析离子动能（MIKE）和高分辨率数据提出并证实了它们的碎裂途径。一般来说，这些化合物谱图中的主要碎裂途径源自失去一个氢或甲基的α-裂解。氢和甲基丢失之间的差异极大地影响了随后的碎裂。尽管由于它们的螺旋性，这些环状酯具有旋光性，但未观察到与立体相关的碎裂途径。版权所有2000约翰威立父子有限公司。

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