Dual Photoredox/Nickel-Catalyzed 1,4-Sulfonylarylation of 1,3-Enynes with Sulfinate Salts and Aryl Halides: Entry into Tetrasubstituted Allenes
作者:Ting Xu、Shuang Wu、Quan-Na Zhang、You Wu、Ming Hu、Jin-Heng Li
DOI:10.1021/acs.orglett.1c03179
日期:2021.11.5
A radical-mediated three-component 1,4-sulfonylarylation of 1,3-enynes with aryl iodides and sulfinate salts using cooperativephotoredox/nickelcatalysis is described. This protocol enables the synthesis of tetrasubstituted sulfonyl-containing allenes under redox-neutral conditions and provides a versatile 1,3-enyne 1,4-difunctionalization platform for the synthesis of a diverse range of tetrasubstituted
Nickel‐Catalyzed Carbofluoroalkylation of 1,3‐Enynes to Access Structurally Diverse Fluoroalkylated Allenes
作者:Kai‐Fan Zhang、Kang‐Jie Bian、Chao Li、Jie Sheng、Yan Li、Xi‐Sheng Wang
DOI:10.1002/anie.201813184
日期:2019.4
A nickel‐catalyzed 1,4‐carbofluoroalkylation of 1,3‐enynes to access structurally diverse fluoroalkylated allenes has been established. This method has demonstrated high catalytic reactivity, mild reaction conditions, broad substrate scope, and excellent functional‐group tolerance. The key to success is the use of a nickel catalyst to generate different fluoroalkyl radicals from readily available and
Stereo- and Regioselective <i>cis</i>-Hydrophosphorylation of 1,3-Enynes Enabled by the Visible-Light Irradiation of NiCl<sub>2</sub>(PPh<sub>3</sub>)<sub>2</sub>
Described herein is a stereo- and regioselective cis-hydrophosphorylation reaction of the internal alkyne of 1,3-enynes that accesses various 1,3-dienes in good isolated yields. The visible-light irradiation of NiCl2(PPh3)2 allows the generation of highly reactive nickel(II)-phosphorus species that subsequently migrate into the internal alkyne of the 1,3-enynes and protonate the resulting vinyl nickel
Copper/Di-tert-butyl Peroxide-Catalyzed Regioselective Hydroxyphosphorylation of 1,3-Enynes
作者:Shaoqun Zhu、Jiawei Wang、Bing Zhou、Hong Hou
DOI:10.1055/a-1503-9010
日期:2021.10
AbstractThe copper/di-tert-butyl peroxide-catalyzed regioselective hydroxyphosphorylation of 1,3-enynes is described. The advantages of the reported radical reactions are excellent functional group tolerance, the use of a catalytic amount of copper and di-tert-butyl peroxide ( t BuOO t Bu) as a radical initiator, and mild reaction conditions. The desired products are obtained in moderate to excellent
摘要描述了铜/过氧化二叔丁基催化1,3-烯炔的区域选择性羟基磷酸化。所报道的自由基反应的优点是具有优异的官能团耐受性、使用催化量的铜和过氧化二叔丁基 (t BuOO t Bu) 作为自由基引发剂以及反应条件温和。纯化后以中等至极好的收率获得所需产物。
Palladium-Catalyzed One-Pot Synthesis of Highly Substituted Furans by a Three-Component Annulation Reaction
A new three-component cyclization−coupling reaction catalyzed by palladium was developed, producing polysubstituted furans in good yields from readily available substrates. The reaction conditions and the scope of the process were examined, and a possible mechanism is proposed.