Directed Cobalt-Catalyzed C–H Activation to Form C–C and C–O Bonds in One Pot via Three-Component Coupling
作者:Meng-Hui Li、Xiao-Ju Si、He Zhang、Dandan Yang、Jun-Long Niu、Mao-Ping Song
DOI:10.1021/acs.orglett.0c04122
日期:2021.2.5
Herein, we disclose an efficient cobalt-catalyzed three-component coupling of benzamides, diazo compounds, and tert-butyl hydroperoxide, which provides an efficient approach to construct C(sp2)–C(sp3) and C–O bonds in one-pot accompanied with C–H activation. This protocol features low catalyst loading (4 mol %), the avoidance of additives, and excellent functional group compatibility, providing three-component
Atom-Economical Access to Highly Substituted Indenes and Furan-2-ones via Tandem Reaction of Diazo Compounds and Propargyl Alcohols
作者:Sengodagounder Muthusamy、Manickasamy Sivaguru
DOI:10.1021/ol501942y
日期:2014.8.15
A facilesynthesis of highly substituted as well as conjugated indene/furanone systems via a BF3·OEt2 catalyzed tandem reaction of α-diazo-esters/-amides and propargyl alcohols has been demonstrated under mild conditions. This method offers great potential for the synthesis of biologically active indene and furanone derivatives and their related polycyclic compounds.
Rhodium(II) catalyzed highly diastereoselective synthesis of conformationally restricted dispiro[1,3-dioxolane]bisoxindoles
作者:Sengodagounder Muthusamy、Rajagopal Ramkumar
DOI:10.1016/j.tet.2014.06.085
日期:2014.9
Synthesis of conformationally restricted dispiro- and bis-dispiro-1,3-dioxolanes via three-component reaction of diazoamides, ketoamides/diketones, and aromatic/heteroaromatic aldehydes in the presence of rhodium(II) acetate dimer catalyst at room temperature involving carbonyl ylides is demonstrated with diastereoselectivity. Synthesis of macrocyclic dispiro-1,3-dioxolanes via intramolecular carbonyl
Photochemical O−H Functionalization Reactions of Cyclic Diazoamides
作者:Claire Empel、Dennis Verspeek、Sripati Jana、Rene M. Koenigs
DOI:10.1002/adsc.202000818
日期:2020.11.4
Herein, we describe the photochemical O−H functionalization reaction of acidic alcohols with cyclic diazoamides. We studied the O−H functionalization reaction of different fluorinated and non‐fluorinated alcohols to give the corresponding ether products in high yields (43 examples, up to 97% yield). Furthermore, we performed studies to evaluate a photoexcited proton transfer reaction pathway in comparison
Construction of 2-alkynyl aza-spiro[4,5]indole scaffolds <i>via</i> sequential C–H activations for modular click chemistry libraries
作者:Jun Zhang、Mengmeng Wang、Huiying Wang、Hui Xu、Junjie Chen、Ziqiong Guo、Biao Ma、Shu-Rong Ban、Hui-Xiong Dai
DOI:10.1039/d1cc02798k
日期:——
one-pot, three-step synthesis demonstrated the utility of this protocol. Hybrid conjugates with an oseltamivir derivative further offered a powerful tool for the construction of a versatile spiroindole-containing library via click chemistry.