Intramolecular ring-to-ring proton transfer in gaseous (.omega.-phenylalkyl)benzenium ions
作者:Dietmar Kuck、Wolfgang Baether、Hans Friedrich Gruetzmacher
DOI:10.1021/ja00518a004
日期:1979.11
corresponding 1 -(a-phenylalkyl)- 1,4-dihydrobenzoic acids 4 and 5. The major secondary fragmentation is loss of benzene from 1 and 2. It is shown by deuterium labeling that 1 and 2 ions undergo repeated ring-to-ring proton transfer reactions, equilibrating all of the 11 "aromatic" hydrogen atoms within s without involving those from the aliphatic chain. A competition between the ring-to-ring (quasi-intermolecular)
气态(2-苯基乙基)苯鎓和(3-苯基1丙基)苯鎓离子 1 和 2 很容易通过质谱损失从相应的 1-(α-苯基烷基)- 1,4-二氢苯甲酸的正分子离子中的 CO2H 生成酸 4 和 5。主要的二次碎裂是苯从 1 和 2 的损失。氘标记表明 1 和 2 离子经历重复的环到环质子转移反应,平衡了所有 11 个“芳香”氢原子在 s 内,不涉及脂肪链中的那些。讨论了环到环(准分子间)质子转移和环内质子转移(“环行走”)之间的竞争。