137476-55-2Relevant academic research and scientific papers
Copper-Catalyzed Perfluoroalkylation of Alkynyl Bromides and Terminal Alkynes
Fan, Shilu,Zheng, Chenggong,Zheng, Kaiting,Li, Junlan,Liu, Yaomei,Yan, Fangpei,Xiao, Hua,Feng, Yi-Si,Zhu, Yuan-Yuan
, p. 3190 - 3194 (2021)
A copper-catalyzed one-pot perfluoroalkylation of alkynyl bromides and terminal alkynes has been disclosed, and the corresponding perfluoroalkylated alkynes could be attained in good to excellent yields. The new straightforward transformation shows high efficiency (0.01-0.5 mol % catalyst loading), broad substrate scope, and remarkable functional group tolerance and provides a facile approach for useful application in life and material sciences.
Palladium-catalyzed bromoalkynylation of C-C double bonds: Ring-structure-dependent synthesis of 7-alkynyl norbornanes and cyclobutenyl halides
Li, Yibiao,Liu, Xiaohang,Jiang, Huanfeng,Liu, Bifu,Chen, Zhengwang,Zhou, Peng
supporting information; experimental part, p. 6341 - 6345 (2011/09/13)
Strain versus flexibility: The palladium-catalyzed reaction of haloalkynes with norbornene derivatives leads to 7-alkynyl norbornane products (see scheme). Key to the success of this reaction is the formation of a "bridging" palladium species, which can rearrange to result in a C-7 functionalization. The ring-structure-dependent [2+2] cycloaddition of haloalkynes with cyclooctene has been achieved in moderate to good yields under similar conditions. Copyright
Synthesis and Physical Properties of Asymmetric Diphenyldiacetylenic Liquid Crystals
Meng, H.-H. B.,Dalton, L. R.,Wu, S.-T.
, p. 303 - 314 (2007/10/02)
Fifty-six asymmetric diphenyl-diacetylene liquid crystal homologs including dialkyl, alkyl-alkoxy, cyano-alkyl, chloro-alkyl, fluoro-alkyl, difluoro-alkyl, lateral chloro-substituted fluoro-alkyl (or alkoxy), lateral fluoro-substituted asymmetric dialkyl, and vinyl-alkyl are synthesized and their physical properties evaluated.Among these asymmetric diphenyl-diacetylene liquid crystals, many dialkyl homologs exhibit low melting point, wide nematic range, and low heat of fusion.They are ideal host candidates for formulating eutectic mixtures.The polar groups make important contributions to the phase transition temperature, dielectric anisotropy, refractive indices and viscosity.Detailed effects depend on the position of the substitution.These new liquid-crystals compounds and mixtures are particularly useful for electro-optic modulation of infrared radiation. - Keywords: Diphenyl-diacetylenes, eutectic mixtures, electro-optic modulation, physical properties
