Rh-catalyzed alkene oxidation: a highly efficient and selective process for preparing N-alkoxysulfonyl aziridines
作者:Kiran Guthikonda、Paul M. Wehn、Brian J. Caliando、J. Du Bois
DOI:10.1016/j.tet.2006.07.099
日期:2006.12
Unique alkoxysulfonyl aziridine heterocycles were prepared through selective intra- and intermolecular alkeneoxidation reactions. These methods are general and perform efficiently at low Rh-catalyst loadings (1–2 mol %) with only a slight excess of an inexpensive commercial oxidant, PhI(OAc)2. For intermolecular processes, trichloroethylsulfamate was identified as a novel and markedly effective N-atom
Rhodium-catalyzed intermolecular C(sp<sup>3</sup>)–H amination in a purely aqueous system
作者:Xunbo Lu、Yufeng Shi、Fangrui Zhong
DOI:10.1039/c7gc03149a
日期:——
An efficient Rh-catalyzed intermolecularC(sp3)–Hamination in a purely aqueous system is developed for the first time. This methodology features environmental benignity, broad substrate scope and versatility in late-stage functionalization of several biologically important molecules. Such an oxidation protocol provides easy access to various aliphatic amine derivatives in an efficient and sustainable
Catalyst-Controlled and Tunable, Chemoselective Silver-Catalyzed Intermolecular Nitrene Transfer: Experimental and Computational Studies
作者:Nicholas S. Dolan、Ryan J. Scamp、Tzuhsiung Yang、John F. Berry、Jennifer M. Schomaker
DOI:10.1021/jacs.6b07981
日期:2016.11.9
area of interest. In particular, the ability to control the chemoselectivity of intermolecular reactions in the presence of multiple reactive sites has been a long-standing challenge in the field. In this paper, we demonstrate examples of silver-catalyzed, nondirected, intermolecular nitrene transfer reactions that are both chemoselective and flexible for aziridination or C-H insertion, depending on
Herein, we describe the intermolecular amination of allyl alcohols with sulfamates, which have been underutilized as nitrogen nucleophiles for allylic amination. Methyl sulfamate is a good nucleophile in the presence of mercuric triflate and efficiently generates monoallylation products in excellent yield at room temperature. Furthermore, the solid-supported mercuric catalyst silaphenyl mercuric triflate