作者:Anna M. Wagner、Amanda J. Hickman、Melanie S. Sanford
DOI:10.1021/ja408112j
日期:2013.10.23
with diaryliodonium salts. The site selectivity of these reactions is predominantly controlled by steric factors. Remarkably, Na2PtCl4-catalyzed naphthalene arylation proceeds with opposite site selectivity compared to that obtained with Na2PdCl4 as the catalyst. Preliminary mechanistic studies provide evidence for a Pt(II)/Pt(IV) catalytic cycle involving rate-limiting C-C bond-forming reductive elimination
本报告描述了 Na2PtCl4 催化芳烃底物与二芳基碘盐的 CH 芳基化。这些反应的位点选择性主要受空间因素控制。值得注意的是,与使用 Na2PdCl4 作为催化剂获得的相比,Na2PtCl4 催化的萘芳基化以相反的位点选择性进行。初步机理研究为涉及限速 CC 键形成还原消除的 Pt(II)/Pt(IV) 催化循环提供了证据。