Sp–sp3 C–C bond formation via Fe(OTf)3/TfOH cocatalyzed coupling reaction of terminal alkynes with benzylic alcohols
作者:Shi-Kai Xiang、Li-He Zhang、Ning Jiao
DOI:10.1039/b911905a
日期:——
An Fe(OTf)(3)/TfOH cocatalyzed sp-sp(3) C-C bond formation through the coupling of benzylic alcohols with terminalalkynes in the absence of base has been developed. H(2)O is the sole by-product.
Catalytic CN Bond Alkynylation of<i>N</i>-Benzylic Sulfonamides with Terminal Alkynes
作者:Congrong Liu、Fulai Yang、Tingting Wang
DOI:10.1002/cjoc.201400194
日期:2014.5
of N‐benzylic sulfonamides with terminalalkynes for the synthesis of internal alkynes is reported. In the presence of 5 mol% of (Tf)2NH/Bi(OTf)3 (1:1), a broad range of N‐benzylic sulfonamides react smoothly with arylacetylenes to afford structurally diverse internal alkynes in moderate to excellent yields. We reasoned that vinyl cations could be formed by the regioselective attack of terminal alkynes
Cu(OTf)2-catalyzed arylmethylation of terminal alkynes with benzylic alcohols under ligand-, base-, and additive-free reaction conditions
作者:Kai Ren、Pinhua Li、Lei Wang、Xiuli Zhang
DOI:10.1016/j.tet.2011.02.050
日期:2011.4
An effective, convenient, and mild coupling reaction of benzylic alcohols with terminal alkynes has been developed. As an effective Lewis acid, Cu(OTF)(2)-catalyzed arylmethylation of terminal alkynes with benzylic alcohols generated the corresponding products in BrCH2CH2Br with good yields in the absence of ligand, base, and additive. (C) 2011 Elsevier Ltd. All rights reserved.
Iron(III)-Mediated Bicyclization of 1,2-Allenyl Aryl Ketones: Assembly of Indanone-Fused Polycyclic Scaffolds and Dibenzo[<i>a</i>,<i>e</i>]pentalene Derivatives
fused carbocycles is a key challenge in synthetic chemistry. Herein, an unprecedented and practical tandem Nazarov/oxidative umpolung 4π-ring closure of readily available 1,2-allenyl aryl ketones mediated by iron(III) chloride has been developed, furnishing a new family of indanone-fused molecular architectures in moderate to excellent yields. The indanone-containing blocks can be efficiently converted