Silicate Esters of Paclitaxel and Docetaxel: Synthesis, Hydrophobicity, Hydrolytic Stability, Cytotoxicity, and Prodrug Potential
作者:Adam R. Wohl、Andrew R. Michel、Stephen Kalscheuer、Christopher W. Macosko、Jayanth Panyam、Thomas R. Hoye
DOI:10.1021/jm401708f
日期:2014.3.27
report here the synthesis and selected properties of various silicate ester derivatives (tetraalkoxysilanes) of the taxanes paclitaxel (PTX) and docetaxel (DTX) [i.e., PTX-OSi(OR)3 and DTX-OSi(OR)3]. Both the hydrophobicity and hydrolytic lability of these silicates can be (independently) controlled by choice of the alkyl group (R). The synthesis, structural characterization, hydrolytic reactivity, and
catalytic amount of iron(II) triflate, TIPS-protected peroxides bearing primary, secondary, and tertiary C-H sites undergo chemoselective thioetherification of remote C-H bonds with diaryl disulfides. The reaction demonstrates a broad substrate scope and functional group tolerance without the use of any noble metal additives. Mechanistic experiments suggest that the reaction proceeds through 1,5-H atom
[EN] SILICATE PRODRUGS AND NANOPARTICLES<br/>[FR] PROMÉDICAMENTS ET NANOPARTICULES DE SILICATE
申请人:UNIV MINNESOTA
公开号:WO2012166949A1
公开(公告)日:2012-12-06
The invention provides silicate prodrugs comprising a therapeutic agent linked to one or more groups of formula (I): -Si(OR)3 (I); wherein each R independently has any of the values defined herein, as well as nanoparticles comprising such compounds.
Low‐Coordinate Barium Boryloxides: Synthesis and Dehydrocoupling Catalysis for the Production of Borasiloxanes
作者:Erwann Le Coz、Vincent Dorcet、Thierry Roisnel、Sven Tobisch、Jean‐François Carpentier、Yann Sarazin
DOI:10.1002/anie.201807297
日期:2018.9.3
The first soluble bariumboryloxides [Ba]– OBCH(SiMe3)2} are presented. These mono‐ or dinuclear complexes feature low coordination numbers, as low as two for [Ba(OBCH(SiMe3)2}2)2], which is further stabilized by intra‐ and intermolecular Ba⋅⋅⋅H3C agostic interactions. Bariumboryloxides and the parent [BaN(SiMe3)2}2⋅(thf)2] catalyze the dehydrocoupling of borinic acids with hydrosilanes, providing
A composition selected from the group consisting of bis(tert-butoxy)(isopropoxy)silanol, bis(isopropoxy)(tert-butoxy)silanol, bis(tert-pentoxy)(isopropoxy)silanol, bis(isopropoxy)(tert-pentoxy)silanol, bis(tert-pentoxy)(tert-butoxy)silanol, bis(tert-butoxy)(tert-pentoxy)silanol and mixtures thereof; its use to form a metal or metalloid silicate layer on a substrate and the synthesis of the mixed alkoxysilanols.