Copper-Catalyzed Amino Lactonization and Amino Oxygenation of Alkenes Using <i>O</i>-Benzoylhydroxylamines
作者:Brett N. Hemric、Kun Shen、Qiu Wang
DOI:10.1021/jacs.6b02840
日期:2016.5.11
A copper-catalyzed amino lactonization of unsaturated carboxylic acids has been achieved as well as the analogous intermolecular three-component amino oxygenation of olefins. The transformation features mild conditions and a remarkably broad substrate scope, offering a novel and efficient approach to construct a wide range of amino lactones as well as 1,2-amino alcohol derivatives. Mechanistic studies
Copper-Catalyzed Alkene Aminoazidation as a Rapid Entry to 1,2-Diamines and Installation of an Azide Reporter onto Azahetereocycles
作者:Kun Shen、Qiu Wang
DOI:10.1021/jacs.7b06852
日期:2017.9.20
A copper-catalyzed aminoazidation of unactivated alkenes is achieved for the synthesis of versatile unsymmetrical 1,2-diamine derivatives. This transformation offers an effective approach to installing an amide and an azide from two diffenent amino precursors onto both terminal and internal alkenes, with remarkable regio- and stereoselectivity. Mechanistic studies show that this diamination reaction
Visible-Light Photoredox-Catalyzed Sulfonyl Lactonization of Alkenoic Acids with Sulfonyl Chlorides for Sulfonyl Lactone Synthesis
作者:Wei-Hao Rao、Qi Li、Fang-Yuan Chen、Li-Li Jiang、Pan Xu、Xue-Wan Deng、Ming Li、Guo-Dong Zou、Xinhua Cao
DOI:10.1021/acs.joc.1c01378
日期:2021.9.3
A visible-light photoredox-catalyzed sulfonyl lactonization of unsaturated carboxylic acids with sulfonyl chlorides is described. This reaction features good functional group tolerance and a broad substrate scope, providing a simple and efficient protocol to access a wide range of sulfonyl lactones in high to excellent yields. Preliminary mechanistic investigations suggested that a free-radical pathway
Reversing the Regioselectivity of Halofunctionalization Reactions through Cooperative Photoredox and Copper Catalysis
作者:Jeremy D. Griffin、Cortney L. Cavanaugh、David A. Nicewicz
DOI:10.1002/anie.201610722
日期:2017.2.13
Halofunctionalization of alkenes is a classical method for olefin difunctionalization. It gives rise to adducts which are found in many natural products and biologically active molecules, and offers a synthetic handle for further manipulation. Classically, this reaction is performed with an electrophilic halogen source and leads to regioselective formation of the halofunctionalized adducts. Herein
Saturated oxygen and nitrogen heterocycles <i>via</i> oxidative coupling of alkyltrifluoroborates with alkenols, alkenoic acids and protected alkenylamines
作者:Jonathan M. Shikora、Chanchamnan Um、Zainab M. Khoder、Sherry R. Chemler
DOI:10.1039/c9sc02835h
日期:——
Saturated heterocycles are important components of many bioactive compounds. The method disclosed herein enables a general route to a range of 5-, 6- and 7-membered oxygen and nitrogenheterocycles by coupling potassium alkyltrifluoroborates with heteroatom-tethered alkenes, predominantly styrenes, undercopper-catalyzedconditions, in the presence of MnO2. The method was applied to the synthesis of