Ligand-Controlled Ruthenium-Catalyzed Borrowing-Hydrogen and Interrupted-Borrowing-Hydrogen Methodologies: Functionalization of Ketones Using Methanol as a C1 Source
作者:Priyabrata Biswal、M. Siva Subramani、Shaikh Samser、Vadapalli Chandrasekhar、Krishnan Venkatasubbaiah
DOI:10.1021/acs.joc.2c00653
日期:——
phosphine-free N,C–Ru and N,N–Ru catalysts for ligand-controlled borrowing-hydrogen (BH) and interrupted-borrowing-hydrogen (I-BH) methods, respectively. This protocol has been employed on a variety of ketones using MeOH as a green, sustainable, and alternative C1 source to form a C–C bond through the BH and I-BH methods. Reasonably good substrate scope, functional group tolerance, and good-to-excellent yields
在此,我们分别报告了用于配体控制借氢 (BH) 和间断借氢 (I-BH) 方法的简单、高效且不含膦的 N,C-Ru 和 N,N-Ru 催化剂。该协议已应用于各种酮,使用 MeOH 作为绿色、可持续和替代 C1 源,通过 BH 和 I-BH 方法形成 C-C 键。相当好的底物范围、官能团耐受性和 70 °C 下的良好到优异的产量是这些方法的额外亮点。受控实验表明,原位形成的甲醛是这种配体控制的选择性方案中的关键要素之一,甲醛与酮反应后会生成烯酮作为中间体。这种烯酮在 N,C-Ru 催化剂和 N,