Substrate-Directed Hydroacylation: Rhodium-Catalyzed Coupling of Vinylphenols and Nonchelating Aldehydes
作者:Stephen K. Murphy、Achim Bruch、Vy M. Dong
DOI:10.1002/anie.201309987
日期:2014.2.24
alkenyl, and alkyl aldehydes to form branched products with high selectivity. This cross‐coupling yields α‐aryl ketones that can be cyclized to benzofurans, and it enables access to eupomatenoid natural products in four steps or less from eugenol. Excellent reactivity and high levels of regioselectivity for the formation of the branched products were observed. We propose that aldehyde decarbonylation
我们报告了乙烯基苯酚与芳基、烯基和烷基醛进行加氢酰化以形成高选择性支化产物的方案。这种交叉偶联产生可环化为苯并呋喃的α-芳基酮,并且可以通过四步或更短的步骤从丁子香酚获得类丁子香素天然产物。观察到支化产物的形成具有优异的反应性和高水平的区域选择性。我们建议通过在烯烃上使用阴离子导向基团和具有小咬角的二膦配体来避免醛脱羰。