Iodobenzene Dichloride as a Stoichiometric Oxidant for the Conversion of Alcohols into Carbonyl Compounds; Two Facile Methods for Its Preparation
作者:Chi Zhang、Xue-Fei Zhao
DOI:10.1055/s-2007-965889
日期:2007.2
the preparation of iodoarene dichlorides from iodoarenes have been developed. One employs solid sodium chlorite as a chlorinating agent in dilute hydrochloric acid solution; the other uses sodium hypochlorite as a chlorinating agent still in hydrochloric acid solution, which is more robust than the sodium chlorite system. Typically, the preparation of iodobenzene dichloride from iodobenzene was performed
描述了一种使用 2,2,6,6-四甲基哌啶-1-基氧基 (TEMPO) 作为催化剂、碘苯二氯化物 (PhICl 2 ) 作为化学计量氧化剂和吡啶来氧化不同类型醇的高效温和的方法作为基础。根据所使用的碘苯二氯化物的量,该过程还可将 1,2-二醇顺利氧化为 α-羟基酮或 α-二酮。一项竞争性研究表明,使用 2,2,6,6-四甲基哌啶-1-基氧基/碘苯二氯化物/吡啶系统,脂肪族仲醇优先于脂肪族伯醇氧化。此外,已经开发了两种非常方便且高产率的从碘芳烃制备碘芳烃二氯化物的方法。一种是在稀盐酸溶液中采用固体亚氯酸钠作为氯化剂;另一种使用次氯酸钠作为氯化剂,仍然在盐酸溶液中,比亚氯酸钠系统更稳定。通常,使用次氯酸钠/盐酸系统在五分钟内从碘苯制备二氯化碘苯。