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An efficient method for C-N bond formation via aza-Michael addition of γ-aminopropylsilatranes to substituted N-phenylmaleimides under mild conditions is described. The five receptors enclosing the maleimide moiety have been synthesized by the aza-Michael addition to strong nucleophile γ-aminopropylsilatrane producing silatranes possessing substituted N-phenylsuccinimide at the axial position without any catalyst. All the compounds have been characterized by elemental analysis, spectroscopic techniques and thermo-gravimetric analysis. The synthesized compounds have been screened for possible antimicrobial properties and results have shown modest activity. 相似文献
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The silicon (IV) compounds possessing SiN4O2 (6), SiN2O2C2 (7, 8), SiN2O2CCl (9) and SiN4O4 (10) coordinating frameworks have been synthesized in high yield by the reaction of the O,N,N,O- donor salen-type ligand N,N’-bis(salicylidene)ethylenediimine L with different silanes i.e. diethoxydiisocyanatosilane-(C2H5O)2Si(NCO)2 1, dichlorodiphenylsilane-Ph2SiCl2 2, dichloromethyl- phenylsilane-MePhSiCl2 3, trichlorophenylsilane-PhSiCl3 4 and silicon tetrachloride-SiCl4 5. The compounds 6–10 have been characterized by elemental analysis, IR, 1H, 13C and 29Si NMR and mass spectrometry. The decomposition reactivity of these compounds has been studied using a Thermal Gravimetric Analyzer (TGA) at a heating rate of 10°C/minute in an inert atmosphere. 相似文献
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Singh Gurjaspreet Girdhar Shally Singh Akshpreet Saroa Amandeep Satija Pinky Verma Vikas Singh Jasbhinder 《SILICON》2019,11(6):2583-2589
Silicon - The present work aims at the synthesis of γ-propylsilatrane, possessing 2,5-dimercapto-1,3,4-thiadiazole (H2dmtd) moiety tethered to γ- position of propyl chain derived from... 相似文献
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Singh Gurjaspreet Singh Jasbhinder Singh Jandeep Singh Akshpreet Gupta Kshitiz Chhibber Sanjay Verma Vikas 《SILICON》2018,10(6):2817-2827
Silicon - The synthesis of different Schiff base substituted silatranes (1c–4c) was carried out from the corresponding organotrimethoxysilanes (OTMS) (1b–4b) under anhydrous atmospheric... 相似文献
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Ram Prakash Chauhan Rashi Mathur Gurjaspreet Singh Narmada Bag Sweta Singh Krishna Chuttani B. S. Hemanth Kumar Satyam K. Agrawal Anil K. Mishra 《Journal of Materials Science》2013,48(11):3913-3925
Target-specific nanoparticles with good stability, dispersibility and targeting properties are very desirable for in vivo applications like diagnosis and therapy. In this work, the potential of covalently biotinylated magnetic nanoparticles for targeting tumours has been analysed by various in vitro and in vivo studies. For quantitatively estimating the amount of biotin bound to the surface of magnetic nanoparticles, 4-Hydroxyazobenzene-2-carboxylic acid dye was used. Varying the pH conditions changes, the mean size and zeta potential and transverse relaxivity slightly, affects the contrast enhancing capability of the synthesized biotinylated magnetic nanoparticles minimally. Cytotoxicity of the synthesized nanoconjugate was analysed in two different cell lines HeLa and A549 by using sulpho-rhodamine B assay and tumour cell-targeting capability was analysed in HeLa cell lines by using confocal microscopy. The results of cytotoxicity analysis combined with intracellular uptake, biodistribution and gamma scintigraphy prove the tumour-targeting potential of the synthesized biocompatible biotinylated magnetic nanoparticle conjugate. 相似文献
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Singh Gurjaspreet Shilpy Singh Akshpreet Singh Surjeet Sushma Mohit Thakur Yamini Singh K. N. Soni Sajeev 《SILICON》2023,15(2):867-873
Silicon - The present article includes the generation of aromatic Schiff base tethered organosilatranes via two step synthetic pathways starting from anthracene-10-carbaldehyde and... 相似文献
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