Transmetalation of Alkylzirconocenes in Copper-Catalyzed Alkyl-Alkynyl Cross-Coupling Reactions
作者:Kiran Indukuri、Olivier Riant
DOI:10.1002/adsc.201700164
日期:2017.7.17
simple copper‐catalyzed alkyl–alkynyl cross‐coupling strategy has been developed using the reaction between alkynyl bromides and alkylzirconocenes. The alkylzirconocenes were generated in situ via regioselective addition of Schwartz's reagent (ZrCp2HCl) on to alkenes. The reaction has a broad scope, a range of functionalized bromoalkynes and alkylzirconium reagents were successfully coupled, resulting in
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
Indium(III) Catalyzed Direct sp<sup>3</sup>-sp C-C Bond Formation from Alcohols and Terminal Alkynes
作者:Guangming Nan、Jun Zhou
DOI:10.2174/1570178611310080004
日期:2013.8.1
C-C bond formationreaction via direct coupling of alcohols with terminalalkynes has been developed under mild conditions without any ligand, base or additive, in which both of aromatic and aliphatic alkynes and various alcohols such as benzylic, allylic and propargylicalcohols can be tolerated. This simple reaction system provides an attractive approach to a large number of internal alkynes in moderate
A Copper‐Catalyzed Sonogashira Coupling Reaction of Diverse Activated Alkyl Halides with Terminal Alkynes Under Ambient Conditions
作者:Yu‐Xi Cao、Xiao‐Yang Dong、Jun Yang、Sheng‐Peng Jiang、Shuangliu Zhou、Zhong‐Liang Li、Guo‐Qiang Chen、Xin‐Yuan Liu
DOI:10.1002/adsc.202000189
日期:2020.5.26
We describe a copper‐catalyzed Sonogashira coupling reaction of alkyl halides with terminalalkynesunder ambient conditions, efficiently providing a versatile tool for the construction of substituted alkynes. A new proline‐based N,N,P‐ligand is utilized to promote the transformation under a mild reaction condition. Diverse alkyl halides, such as primary and secondary (hetero)benzyl chlorides and bromides
Triply Selective & Sequential Diversification at C<sub>sp</sub><sup>3</sup>: Expansion of Alkyl Germane Reactivity for C−C & C−Heteroatom Bond Formation
作者:Eric Ahrweiler、Markus D. Schoetz、Gurdeep Singh、Quentin P. Bindschaedler、Alba Sorroche、Franziska Schoenebeck
DOI:10.1002/anie.202401545
日期:2024.4.15
We report the triply selective and sequential diversification of a single Csp3 carbon carrying Cl, Bpin and GeEt3 for the straightforward construction of sp3-rich molecules. The repertoire of alkyl germane functionalizations was also significantly expanded herein.
我们报道了携带 Cl、Bpin 和 GeEt 3的单个 C sp 3碳的三重选择性和顺序多样化,用于直接构建富含 sp 3的分子。烷基锗烷官能化的范围也在此得到显着扩展。