Ambient arylmagnesiation of alkynes catalysed by ligandless nickel(ii)
作者:Fei Xue、Jin Zhao、T. S. Andy Hor
DOI:10.1039/c3cc45202f
日期:——
A simple and efficient catalytic arylmagnesiation of diarylacetylenes and aryl(alkyl)acetylenes is accomplished by NiCl2·6H2O at r.t. in the absence of stabilising ligands. The corresponding tetra-substituted alkenes can be obtained in good yields by subsequent treatment with different electrophiles.
Palladium-catalyzed desulfitative hydroarylation of alkynes with sodium sulfinates
作者:Saiwen Liu、Yang Bai、Xiangxiang Cao、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c3cc43723j
日期:——
A palladium-catalyzeddesulfitative hydroarylation of alkynes with arylsulfinicacid sodium salts is described. The reaction showed good regio- and stereoselectivity, and afforded the hydroarylation products in good yields. Various functional groups were well tolerated under the optimized reaction conditions.
Palladium‐Catalyzed C−H Alkenylation of Arenes with Alkynes: Stereoselective Synthesis of Vinyl Chlorides via a 1,4‐Chlorine Migration
作者:Zhen Li、Wei‐Liang Duan
DOI:10.1002/anie.201808866
日期:2018.12.3
A directing group‐free, ligand‐promoted palladium‐catalyzed C−H arylation of internal alkynes with simple arenes was developed. Alkenyl chlorides resulting from a 1,4‐chlorine migration or trisubstituted alkenes were produced in moderate to good yields depending on the type of alkyne.
Synthesis of Vinylgermanes via the Au/TiO<sub>2</sub>-Catalyzed <i>cis</i>-1,2-Digermylation of Alkynes and the Regioselective Hydrogermylation of Allenes
作者:Anastasia Louka、Manolis Stratakis
DOI:10.1021/acs.orglett.1c00997
日期:2021.5.7
In the presence of Au/TiO2 (1 mol %), terminal alkynes react quantitatively with stoichiometric amounts of the unactivated digermane Me3Ge-GeMe3, forming exclusively cis-1,2-digermylated alkenes. We also establish the Au/TiO2-catalyzed hydrogermylation of terminal allenes with Et3GeH, which exhibits a highlyregioselective mode of addition on the more substituted double bond forming vinylgermanes.
在Au / TiO 2(1 mol%)的存在下,末端炔烃与化学计量的未活化的Digermane Me 3 Ge-GeMe 3进行定量反应,仅形成顺式-1,2-二聚二甲基化的烯烃。我们还建立了用Et 3 GeH的Au / TiO 2催化的末端烯丙基加氢麦芽酰化反应,该化合物在形成更多取代的双键的乙烯基锗烷上表现出高度的区域选择性加成模式。此外,我们提供了有关Pd纳米颗粒催化的1,2-二聚二甲基烯烃与碘代芳烃的CC偶联的初步结果。