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Synthesis of alkoxysilanes Bearing β-Diketone Group through Hydrosilylation

Chinese Chemical Letters 2002年第2期13卷 121-122页

作者： Yuan YAO Wei HUANG Ying HUANG Yun Zhao YU The Center of Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing 100080

alkoxysilane bearing diketone group was synthesized by hydrosilylation of 3-allyl acetylacetone. It was indicated by the 1H NMR spectrum that the C=O group does not interfere with the synthesis.

关键词： Tydrosilylation alkoxysilane b-diketone.

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Bioactivity of quaternary glass prepared from bentonite clay

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Journal of Advanced Ceramics 2016年第1期5卷 47-53页

作者： Luqman A.ADAMS Enobong R.ESSIEN Department of Chemistry University of Lagos Nigeria Department of Chemical Sciences Bells University of Technology P.M.B 1015 Ota Ogun Nigeria

alkoxysilane precursors are the most widely used silica source for sol-gel preparation of silicate-based bioactive glass. However, due to their high cost, alternative sources such as bentonite clay are desirable. In the present work, bentonite clay was reacted with sodium hydroxide (NaOH) to extract sodium metasilicate (Na2SiO3). The obtained Na2SiO3 was converted to gel which was then sintered at 950 ℃ for 3 h to give the bioactive glass in the quaternary composition SiO2-NaO-CaO-P2O5. The resulting glass was incubated in simulated body fluid (SBF) for 0-7 days to evaluate the bioactivity. Furthermore, glass samples were characterized before and after SBF study by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). Results obtained showed the presence of Na2Ca2Si3O9 (combeite) crystal as the major crystalline phase and the formation of hydroxyapatite (HA) and hydroxycarbonated apatite (HCA) on the surface of the glass after immersion in SBF. The material showed potentials for application as scaffold in bone tissue repair.

关键词： bentonite clay bioactivity alkoxysilane hydroxyapatite (HA) bone repair

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Cobalt-Catalyzed Difunctionalization of Styrenes via Ligand Relay Catalysis

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Chinese Journal of Chemistry 2023年第24期41卷 3633-3638页

作者： Bingcheng Wang Yufeng Sun Zhan Lu Department of Chemistry Zhejiang UniversityHangzhouZhejiang310058 China College of Chemistry Zhengzhou UniversityZhengzhouHenan450001 China

Here,we report a cobalt-catalyzed sequential dehydrogenative Heck silylation/hydroamination of styrenes with hydrosilane and diazo compound to access 1-amino-2-silyl compounds with excellent *** difunctionalization reaction could undergo smoothly using 1 mol%catalyst loading with good functional group *** only di-and tri-substituted hydrosilanes,but also alkoxysilane is suitable,which does explore the scope of the family of 1-amino-2-silyl *** ligand relay phenomenon between neutral tridentate NNN ligand and anionic NNN ligand is observed for the first time via absorption spectral analysis in this one-pot,two-step *** primary mechanism has been proposed based on the control experiments.

关键词： Ligand relay catalysis Difunctionalization Styrene alkoxysilane Hydroamination Diazo compounds

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