One-Pot Combination of the Wittig Olefination with Bromination and Oxidation Reactions
作者:Usama Karama、Refat Mahfouz、Zeid Al-Othman、Ismail Warad、Abdulrahman Almansour
DOI:10.1080/00397911.2011.614712
日期:2013.2.1
Abstract A simple one-pot process for in situ bromination of (ethoxycarbonylmethylene)-triphenylphosphorane 1 was carried out. This was followed by oxidation of alcohol using SO3. Pyridine complex as a mild oxidant and in situ trapping of the aldehyde. This process constitutes a stereoselective one-pot procedure for the preparation of Z-configured α-bromo-α, β-unsaturated esters in good yield. GRAPHICAL
摘要 进行了(乙氧基羰基亚甲基)-三苯基正膦 1 原位溴化的简单一锅法。然后使用 SO3 氧化醇。吡啶络合物作为温和的氧化剂并原位捕获醛。该方法构成了一种立体选择性的一锅法,用于以良好的收率制备 Z-构型的 α-溴-α,β-不饱和酯。图形概要