Intramolecular electrophilic aromatic substitution in gas-phase-protonated difunctional compounds containing one or two arylmethyl groups
作者:M. Edelson-Averbukh、A. Mandelbaum
DOI:10.1002/jms.537
日期:2003.11
undergo a rearrangement process upon isobutane chemicalionization and collision-induced dissociation of their MH(+) ions, whereby a new bond is formed between the two benzyl groups, giving rise to abundant [C(14)H(13)](+) (m/z 181) ions. This rearrangement has been explained as an intramolecular electrophilic substitution in the gas phase occurring in an ion-neutral complex formed by the cleavage of one
各种二苄基酯和醚在异丁烷化学电离和碰撞诱导的MH(+)离子解离后经历重排过程,从而在两个苄基之间形成新的键,从而产生大量的[C(14)H (13)](+)(m / z 181)离子。该重排已被解释为在气相中分子内亲电取代发生在离子-中性复合物中,该离子-中性复合物是由苄基-氧键之一的裂解形成的。类似的高效分子内亲电取代反应发生在己二酸二α-和β-萘基甲基酯中,提供m / z 281 [C(22)H(17)](+)离子,但在位阻二-9-蒽甲基中则没有习以为常。在苄基α-和β-萘基甲基环己烷-1中发生了类似的有效重排,4-二羧酸盐和苄基α-和β-苯乙基环己烷-1,4-二甲醇醚。在苄基烯丙基,苄基炔丙基和苄基-9-蒽基甲基衍生物中,类似的重排效率低得多,在苄基异丙基和苄基乙酰基类似物中甚至更低,并且在苄基四氢吡喃基衍生物中不存在这种重排。质子化双官能苄基衍生物的独特行为是根据质子化官能团OR键杂