Copper(I)-catalyzed stereoselective hydrogenation of 1,3-diynes and enynes
作者:Niklas O. Thiel、Sebastian Kemper、Johannes F. Teichert
DOI:10.1016/j.tet.2017.05.029
日期:2017.8
A stereoselective hydrogenation of 1,3-diynes with an air-stable copper(I)/N-heterocyclic carbene complex, [IPrCuOH], has been developed. The corresponding products, 1,3-dienes, are obtained in a stereoselective manner depending on their substitution pattern: Diaryl-diynes yield E,E-1,3-dienes, whereas dialkyl-diynes are converted to the corresponding Z,Z-1,3-dienes. Hydrogenation and deuteration experiments
Pd-catalyzed oxidative homo-coupling of acrylates and aromatic alkenes for the conjugated diene synthesis
作者:Ting Zhu、Zhen Li、Fanhua Xiao、Wei-Liang Duan
DOI:10.1016/j.tetlet.2018.06.026
日期:2018.8
We developed a bidentate monoanionic nitrogen ligand that was effective in the Pd-catalyzed oxidativehomo-coupling reaction of acrylates and aromatic alkenes. In the presence of Pd(OAc)2/ligand several conjugated dienes were obtained in good yields with high stereoselectivities.
A Direct Synthesis of Symmetrical (E,E)-1,4-Diaryl-1,3-butadienes by Wenkert Arylation of Thiophene
作者:Lukas Hintermann、Marco Schmitz、Yun Chen
DOI:10.1002/adsc.201000350
日期:2010.10.4
The nickel-catalyzed coupling of thiophene with aryl Grignard reagents (Wenkert reaction) is accelerated by N-heterocyclic carbene or trialkylphosphane ligands, providing a general, scalable directsynthesis of symmetrical 1,4-diarylbutadienes.
Synthesis of Buta-1,3-dienes through Palladium-Catalyzed Homocoupling of Aromatic Alkenes
作者:Yanmei Wen、Jianying Xie、Chunmei Deng、Yulian Wu
DOI:10.1055/s-0034-1380749
日期:——
A series of buta-1,3-dienes have been directly synthesized via a convenient palladium-catalyzed homodehydrogenation coupling reaction of aromatic alkenes under mild conditions. The homocoupling reaction enables a rapid synthesis of multisubstituted butadiene which shows typical aggregation-induced emission enhancement (AIEE) characteristics because it is practically not emissive in solution but emits blue fluorescence in aggregates.