Mass Spectrometry in Structural and Stereochemical Problems. CCXVII. Electron Impact Promoted Fragmentation of <i>O</i>-Methyl Oximes of some α,β-Unsaturated Ketones and Methyl Substituted Cyclohexanones
作者:Younus M. Sheikh、Raymond J. Liedtke、A. M. Duffield、Carl Djerassi
DOI:10.1139/v72-444
日期:1972.9.1
delineate the modes of mass spectrometric fragmentation of O-methyl oximes of α,β-unsaturated ketones and methyl substituted cyclohexanones. α,β-Unsaturated ketone and 2- and 4-methylcyclohexanone O-methyl oxime ether derivatives fragment upon electron impact in a manner reminiscent of the carbonyl derivatives from which they were prepared. However, several fragmentation sequences characteristic of the O-methyl
氘标记和高分辨率质谱已被用于描述 α,β-不饱和酮和甲基取代的环己酮的 O-甲基肟的质谱裂解模式。α,β-不饱和酮和 2- 和 4- 甲基环己酮 O-甲基肟醚衍生物在电子碰撞时会以类似于制备它们的羰基衍生物的方式断裂。然而,观察到了 O-甲基肟醚基团的几个特征片段序列。