Chloromethylsilane functionalised dendrimers: synthesis and reactivity
摘要:
Tetraallylsilane was functionalised using (chloromethyl)dimethylsilane to give the first generation chloromethyl terminated dendrimer 1. The resulting dendrimer was successfully reacted with K[CpM(CO)(2)] (Cp = eta(5)-C5H5; M = Fe, Ru) to give Si[(CH2)(3)SiMe2CH2MCp(CO)(2)](4) functionalised dendrimers in satisfactory yield. Reaction of dendrimer 1 with NaI in acetone gave the -SiMe2CH2I functionalised dendrimer, while reactions of 1 with K[CpM(CO)(3)] (M = Mo, W, Re), Li[C5Me4H], Na[C5Me4H], the cobaloxime nucleophile or tert-BuLi were not successful. (C) 2004 Elsevier B.V. All rights reserved.
Amine and ammonium functionalization of chloromethylsilane-ended dendrimers. Antimicrobial activity studies
作者:Paula Ortega、Jose Luis Copa-Patiño、Ma Angeles Muñoz-Fernandez、Juan Soliveri、Rafael Gomez、F. Javier de la Mata
DOI:10.1039/b809569h
日期:——
Novel amine- and ammonium-terminated carbosilane dendrimers of type Gn-[SiCH2O-(C6H4)-3-NMe2}]x or Gn-[SiCH2O-(C6H4)-3-NMe3+I−}]x have been synthesized and characterized up to second generation by phenolysis of (chloromethyl)silyl-terminated dendrimers with 3-dimethylamine phenol and subsequent quaternization with methyl iodide. Quaternized carbosilane dendrimers are stable in protic solvents and can be solubilised in water after the addition of less than 1% of dimethyl sulfoxide. A study of the antimicrobial activity of these cationic dendrimers of first and second generation against both Gram-positive and Gram-negative bacteria is also described. The results obtained demonstrate that the new ammonium-terminated carbosilane dendrimers can be considered as multivalent biocides.
Thiol ended carbosilane dendrimers. A multivalent platform for the binding of molecules of biological interest
作者:Paula Ortega、Rafael Gómez、F. Javier de la Mata
DOI:10.1016/j.tetlet.2015.07.085
日期:2015.9
Thiol-ene and thiol-yneaddition reactions can be included inside the category of clickchemistry reactions and have attracted considerable interest in polymer and dendrimerchemistry. An efficient and facile approach to introduce thiol functionalities at the surface of carbosilane dendrimers is presented as a new way for the preparation of a well-defined dendritic multivalent platform, potentially