Palladium-Catalyzed Alkoxycarbonylation of Unactivated Secondary Alkyl Bromides at Low Pressure
作者:Brendon T. Sargent、Erik J. Alexanian
DOI:10.1021/jacs.6b04610
日期:2016.6.22
Catalytic carbonylations of organohalides are important C-C bond formations in chemical synthesis. Carbonylations of unactivated alkyl halides remain a challenge and currently require the use of alkyl iodides under harsh conditions and highpressures of CO. Herein we report a palladium-catalyzed alkoxycarbonylation of secondary alkyl bromides that proceeds at low pressure (2 atm CO) under mild conditions
有机卤化物的催化羰基化是化学合成中重要的 CC 键形成。未活化烷基卤化物的羰基化仍然是一个挑战,目前需要在苛刻条件和高压 CO 下使用烷基碘。在此我们报告了钯催化的仲烷基溴烷氧基羰基化,在温和条件下在低压 (2 atm CO) 下进行. 初步机理研究与混合有机金属-自由基过程一致。这些反应有效地将未活化烷基溴的酯传递到各种底物上,并代表了烷基溴与一氧化碳的第一次催化羰基化。