SUBSTITUTED NUCLEOSIDES, NUCLEOTIDES AND ANALOGS THEREOF
申请人:ALIOS BIOPHARMA, INC.
公开号:US20140179627A1
公开(公告)日:2014-06-26
Disclosed herein are nucleotide analogs, methods of synthesizing nucleotide analogs and methods of treating diseases and/or conditions such as a HCV infection with one or more nucleotide analogs.
Tetrafluoroboric Acid Adsorbed on Silica Gel as a Reusable Heterogeneous Dual-Purpose Catalyst for Conversion of Aldehydes/Ketones into Acetals/Ketals and Back Again
作者:Asit Chakraborti、Dinesh Kumar、Raj Kumar
DOI:10.1055/s-2008-1042940
日期:2008.4
hydes/ketones are regenerated from the corresponding acetals/ ketals in high yields by the treatment with water-alcohol in the pres- ence of HBF4-SiO2 at room temperature for short times. Excellent selectivity was observed during inter- and intramolecular competi- tion studies involving carbonyl substrates with varying electronic and steric environments. Selective acetalformation of benzalde- hyde takes
Oxidation of alkyl phenyl selenides with m-chloroperbenzoic acid in methanol at room temperature affords the corresponding alkyl methyl ethers almost quantitatively, the reaction being accompanied by phenyl migration and ring-contraction respectively when applied to selenides having a phenyl group vicinal to the phenylselenium moiety and to some methoxyselenation products of cyclic olefins.
IPy2BF4-Mediated Rearrangements of 1,2-Difunctionalized Compounds and Olefins
作者:Francisco J. Fañanás、Mónica Álvarez-Pérez、Félix Rodríguez
DOI:10.1002/chem.200500070
日期:2005.10.7
Acetal derivatives are easily obtained from 1,2-difunctionalizedcompounds by a new reaction mediated by IPy2BF4 with a mechanism based on a 1,2-migration of aryl or alkyl groups. A new oxidative rearrangement reaction of olefins is also described. Moreover, when this metal-free protocol is applied to cyclic olefins, interesting ring-contraction reactions are observed. The new methodologies described
Selective hydroformylation–acetalization of various olefins using simple and efficient Rh-phosphinite complex catalyst
作者:Shoeb R. Khan、Bhalchandra M. Bhanage
DOI:10.1016/j.tetlet.2013.08.061
日期:2013.11
A simple and efficientRh-phosphinitecomplexcatalyst was studied for the selective hydroformylation of various olefins. The influence of various reaction parameters including the effect of temperature, pressure, catalyst loading, time, and solvents was studied. The protocol was also applied for the synthesis of various acetals via tandem hydroformylation–acetalization of olefins in alcohols as solvents