An interesting rearrangement has been observed in the mass spectra of a series of N-benzoyl-2-hydroxyalkylamines. The hydrogen atom of the hydroxyl group is transferred to the N-benzoyl portion of the molecular ion and the bond between positions 1 and 2 in the N-alkyl group is cleaved. A rearrangement ion, observed at m/e 135, is formed along with a neutral aldehyde or ketone. When the hydroxylic hydrogen is replaced by a trimethylsilyl substituent, the latter group is transferred with comparable efficiency. Differences in the relative importance of this rearrangement in the mass spectra of a series of related compounds with decreasing substitution at position 2, have been explained by differences in the stabilities of the neutral molecules formed along with m/e 135 and by the occurrence of a double hydrogen rearrangement which competes if hydrogen atoms are present in a relationship gamma and delta to the carbonyl group.
一系列N-苯甲酰-2-羟基烷胺的质谱中观察到了一个有趣的重新排列。羟基的氢原子转移到分子离子的N-苯甲酰部分,N-烷基组的1和2位置之间的键被断裂。在m/e 135处观察到一个重新排列离子,与一个中性醛或酮一起形成。当羟基的氢被三甲基硅烷基取代时,后者的基团以相当高的效率转移。在一系列相关化合物的质谱中,随着2位置取代减少,这种重新排列的相对重要性的差异已经通过形成与m/e 135一起的中性分子的稳定性差异以及双氢重新排列的发生来解释,如果氢原子存在于与羰基的γ和δ位置有关的关系中,则会发生竞争。