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
The First Tri- and Tetraalkoxysilanes with Four Different Substituents
作者:Rasmus P. Clausen、Mikael Bols
DOI:10.1021/jo970317q
日期:1997.6.1
Unsymmetrically substituted tri- and tetraalkoxysilanes were surprisingly found to be configurationally stable and easy to prepare. It was found that compounds of type MeSi(OR)(2)(OR'), MeSi(OR)(OR')(OR ''), Si(OR)(2)(OR')(2), Si(OR)(2)(OR')(OR ''), Si(OR)(3)(OR'), and even Si(OR)(OR')(OR '')(OR*) could be obtained by sequential addition of a variety of chiral and achiral alcohols to methyltrichlorosilane or tetrachlorosilane in the presence of pyridine. In the case of MeSi(OR)(OR')(OR '') and Si(OR)(OR')(OR '')(OR*), two types of compounds that have never been prepared before, were obtained in good yield.
Uchida; Kondo, The journal of the Society of Chemical Industry, Japan. Supplemental binding., 1933, vol. 36, p. 190
作者:Uchida、Kondo
DOI:——
日期:——
Chiral trialkoxysilanols derived from terpene alcohols.
Terpene alcohols (−)-menthol and [(1S)-endo]-(−)-borneol react with SiCl4 in the presence of base to give (MenO)3SiCl (1) and (BorO)3SiCl (2) in high yields. Hydrolysis of 1 yields (MenO)3SiOH (4) and (MenO)4Si (3). Hydrolysis of 2 yields only (BorO)3SiOH (5). The crystal structures of 3 and 5 are reported.