Regiocontrolled Coupling of Aromatic and Vinylic Amides with α-Allenols To Form γ-Lactams via Rhodium(III)-Catalyzed C–H Activation
作者:Zhi Zhou、Guixia Liu、Xiyan Lu
DOI:10.1021/acs.orglett.6b02903
日期:2016.11.4
rhodium(III)-catalyzed C–H activation has been demonstrated. This [4 + 1] annulation reaction provides an efficient method for the synthesis of isoindolinones and 1,5-dihydro-pyrrol-2-ones bearing a tetrasubstituted carbon atom α to the nitrogen atom with good functional group tolerance. The hydroxyl group in the allene substrate is essential in controlling the chemo- and regioselectivity of the reaction probably by
芳香族和乙烯基酰胺与α-烯醇通过铑(III)催化的CH活化进行了温和的区域控制偶联,从而形成γ-内酰胺。该[4 +1]环化反应为合成具有良好官能团耐受性的对氮原子带有四取代碳原子α的异吲哚啉酮和1,5-二氢-吡咯-2-酮提供了一种有效的方法。丙二烯底物中的羟基可能通过与铑催化剂的配位相互作用控制反应的化学和区域选择性。