Ketone Synthesis by a Nickel-Catalyzed Dehydrogenative Cross-Coupling of Primary Alcohols
作者:Thomas Verheyen、Lars van Turnhout、Jaya Kishore Vandavasi、Eric S. Isbrandt、Wim M. De Borggraeve、Stephen G. Newman
DOI:10.1021/jacs.9b03280
日期:2019.5.1
intermolecular coupling of primary alcohols and organotriflates has been developed to provide ketones by the action of a Ni(0) catalyst. This oxidative transformation is proposed to occur by the union of three distinct catalytic cycles. Two competitive oxidation processes generate aldehyde in situ via hydrogen transfer oxidation or (pseudo)dehalogenation pathways. As aldehyde forms, a Ni-catalyzed carbonyl-Heck
伯醇和有机三氟甲磺酸酯的分子间偶联已被开发出来,通过 Ni(0) 催化剂的作用提供酮。这种氧化转化被认为是通过三个不同的催化循环的结合而发生的。两种竞争性氧化过程通过氢转移氧化或(伪)脱卤途径原位生成醛。随着醛的形成,Ni催化的羰基-Heck过程能够形成关键的碳-碳键。通过合成多种复杂的生物活性分子,证明了这种稀有醇转化为酮的效用。