Spectroscopic and structural aspects of the reactions of 1,4-quinones with sulfur and nitrogen nucleophiles
作者:Nilufer Bayrak、Amaç Fatih Tuyun、Hatice Yıldırım、Nihal Onul
DOI:10.1016/j.crci.2013.10.022
日期:2014.6
Résumé A series of 1,4-benzoquinone derivatives from 2,5-dichloro-3,6-diethoxy-1,4-benzoquinone and 2,6-dichloro-3,5-diethoxy-1,4-benzoquinone were prepared by nucleophilic substitution reactions of sulfur and nitrogen nucleophiles. Spectral techniques (1H NMR, 13C NMR, FT–IR, and LC–MS) were employed to structurally characterize the reaction products of alkoxy, chloro substituted-1,4-benzoquinones with thiols and amines in the presence of sodium carbonate in ethanol at room temperature. The orientations and the regioselectivity of the reactions of alkoxy, chloro substituted-1,4-benzoquinones with various thiol and amine nucleophiles are discussed.
摘要 通过硫和氮亲核物的亲核取代反应,制备了一系列由 2,5-二氯-3,6-二乙氧基-1,4-苯醌和 2,6-二氯-3,5-二乙氧基-1,4-苯醌组成的 1,4-苯醌衍生物。采用光谱技术(1H NMR、13C NMR、FT-IR 和 LC-MS)对烷氧基、氯取代-1,4-苯醌与硫醇和胺在碳酸钠存在下于室温乙醇中的反应产物进行了结构表征。讨论了烷氧基、氯代-1,4-苯醌与各种硫醇和胺类亲核物反应的取向和区域选择性。