Preparation and reactivity studies of 1,2-bis-triisopropylsilanylsulfanyl-alkenes
摘要:
The cross-coupling reaction of bis-triisopropylsilyl disulfide 1 on alkynes yielded 1,2-bis-triisopropylsilanylsulfanyl-alkenes 2, a new chemical class. A series of tri and tetrasubstituted olefins 2 were prepared and their behavior toward electrophiles was studied. The triisopropylsilyl groups could be readily removed by treatment with TBAF at 0 degreesC for 1 h or cesium acetate at 70 degreesC for 2 h. Soft and hard electrophiles were submitted to 2 under these conditions. The electrophiles can either react to yield double addition products with alkyl and activated halides, epoxides and acyl chlorides or cyclic adducts with chloroformate derivatives. In the latter case, 1,3-dithiol-2-ones or 1,3-dithiol-2-thiones are prepared. (C) 2001 Elsevier Science Ltd. All rights reserved.
Palladium Catalyzed Reaction of Bis(triisopropylsilyl)disulfide with Acetylenes
作者:Yves Gareau、Arturo Orellana
DOI:10.1055/s-1997-5774
日期:1997.7
The cross-coupling reaction of Bis(triisopropylsilyl)-disulfide on acetylenes yielded 1,2-alkylthioolefins after deprotection with TBAF and quenched with an electrophile.
Preparation of 2,5,7-Trithiabicyclo[2.2.1]heptane from 1,2-Bis-triisopropylsilanylsulfanyl Alkenes
作者:Yves Gareau、Hélène Juteau、Nancy N. Tsou、Richard G. Ball
DOI:10.1021/ol0524858
日期:2006.1.1
[reaction: see text] The chemical behavior of 1,2-bis-triisopropylsilanylsulfanyl alkenes 1 is relatively unexplored, and the weak sulfur-silicon bonds give rise to various transformations. Under acidic conditions (HCl) and in the presence of a Lewis acid at room temperature the bicyclic adduct 2 is obtained in good yield. The structure was confirmed by X-ray crystal analysis with R = benzyl.
Preparation of 1,3-Dithiol-2-ones from 1,2-Bis-triisopropylsilanylsulfanyl Alkenes Under Mild Acidic Conditions
作者:Yves Gareau、Hélène Juteau
DOI:10.1080/10426500307851
日期:2003.5.1
1,2-Bis-triisopropylsilanylsulfanyl alkenes are readily converted to 1,3-dithiol-2-ones with phosgene under very mild acidic conditions at room temperature.
[EN] COMPOUNDS, COMPOSITIONS AND METHODS FOR MODULATING URIC ACID LEVELS<br/>[FR] COMPOSÉS, COMPOSITIONS ET PROCÉDÉS POUR MODULER DES TAUX D'ACIDE URIQUE
申请人:ARDEA BIOSCIENCES INC
公开号:WO2010135530A3
公开(公告)日:2011-05-19
Investigation on the role of the tetrazole in the binding of thiotetrazolylacetanilides with HIV-1 wild type and K103N/Y181C double mutant reverse transcriptases
The role of the tetrazole moiety in the binding of aryl thiotetrazolylacetanilides with HIV-1 wild type and K103N/Y181C double mutant reverse transcriptases was explored. Different acyclic, cyclic and heterocyclic replacements were investigated in order to evaluate the conformational and electronic contribution of the tetrazole ring to the binding of the inhibitors in the NNRTI pocket. The replacement of the tetrazole by a pyrazolyl group led to reversal of selectivity, providing inhibitors with excellent potency against the double mutant reverse transcriptase. (C) 2008 Elsevier Ltd. All rights reserved.