The synthesis of difluoromethyl ethers and sulfides with a simple, non-ozone- depleting reagent is described. The difluoromethylation of phenols with this reagent occurs at room temperature within minutes with exceptional functional group tolerance. The mild conditions makes possible tandem processes for the conversion of aryl boronic acids, aryl halides and arenes to difluoromethyl ethers. Mechanistic studies support a reaction pathway involving nucleophilic attack of the phenolate to difluorocarbene.
描述了使用一种简单、无
臭氧破坏剂的方法合成二
氟甲基醚和
硫醚。使用这种试剂
对酚进行二
氟甲基化反应在室温下几分钟内就能完成,并且具有异常的官能团容忍性。温和的条件使得可能进行串联过程,将芳基
硼酸、芳基卤代烃和
芳烃转化为二
氟甲基醚。机理研究支持一个涉及
酚酚根攻击
二氟卡宾的反应途径。