A process for achieving nucleophilic substitution upon an unactivated monocyclic or polycyclic aromatic or heteroaromatic substrate bearing a suitable leaving group comprising the substitution of said leaving group by an anionic nucleophile is catalyzed with a cyclic or acyclic polydentate chelating ligand, e.g. a crown ether or a cyclic polyether. The process is applicable, inter alia, as the first step in the preparation of ortho-substituted benzenesulfonyl chloride derivatives, or ortho-benzenedithiol, from ortho-dichlorobenzene.
一种在带有适当离去基团的未活化单环或多环芳香族或杂芳族底物上实现亲核取代的工艺,包括在环状或无环多齿螯合
配体(例如
冠醚或环状聚醚)的催化下用阴离子亲核剂取代所述离去基团。该工艺尤其适用于从
邻二氯苯制备邻取代
苯磺酰氯衍
生物或邻
苯二
硫醇的第一步。