Chemoselective Protection of Hydroxyl Groups and Deprotection of Silyl Ethers
作者:Babasaheb P. Bandgar、Suhas P. Kasture
DOI:10.1007/s007060170051
日期:2001.9
Trimethylsilylation of alcohols and phenols is carried out using hexamethyldisilazane and LiClO4 under microwave irradiation and neutral conditions. The deprotection of silyl ethers is carried out similarly using natural kaolinitic clay and a few drops of water.
Preparation of Silica Supported Tin Chloride: As a Recyclable Catalyst for the Silylation of Hydroxyl Groups with HMDS
作者:Khodabakhsh Niknam、Mohammad Ali Zolfigol、Dariush Saberi、Hajar Molaee
DOI:10.1002/jccs.200900181
日期:2009.12
Silica‐supportedtinchloride [SiO2‐Sn(Cl)4‐n] has been prepared by mixing tinchloride with activated silica gel in toluene under refluxing conditions for one day. A range of primary, secondary, and tertiary alcohols as well as phenolic hydroxylgroups were converted into their corresponding trimethylsilyl ethers with hexamethyldisilazane in the presence of catalytic amounts of silica‐supported tin
Rapid and Efficient Trimethylsilyl Protection of Hydroxyl Groups Catalyzed by Niobium(V) Chloride
作者:Jun-Tao Hou、Hong-Li Chen、Zhan-Hui Zhang
DOI:10.1080/10426507.2010.482544
日期:2010.12.30
variety of alcohols, including primary, benzylic, secondary, and phenols with hexamethyldisilazane, has been developed. The reactions were carried out at room temperature in the presence of a catalytic amount of niobium(V) chloride and afforded the corresponding trimethylsilyl ethers in high to excellent yields in short time. GRAPHICAL ABSTRACT
Fast and efficient method for Silylation of alcohols and phenols with HMDS in the presence of bis-thiourea complexes of cobalt, nickel, copper and zinc chlorides
作者:Behzad Zeynizadeh、Serve Sorkhabi
DOI:10.1080/10426507.2017.1417294
日期:2018.3.4
GRAPHICAL ABSTRACT ABSTRACT Bis-thiourea complexes of cobalt, nickel, copper and zinc chlorides were usedefficiently for rapid and efficient trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS) in CH3CN. All reactions were carried out at roomtemperature within immediate-120 min timeframe to afford trimethylsilyl ether derivatives in high to excellent yields. Investigation
Preparation of Nano Silica Supported Sodium Hydrogen Sulfate: As an Efficient Catalyst for the Trimethyl, Triethyl and<i>t</i>-Butyldimethyl Silylations of Aliphatic and Aromatic Alcohols in Solution and under Solvent-free Conditions
作者:Abdolreza Abri、Somayeh Ranjdar
DOI:10.1002/jccs.201300586
日期:2014.8
Nano silicasupportedsodiumhydrogensulfate has been prepared by mixing NaHSO4 with activated Nano silicagel. We wish to report a new method for the synthesis of trimethyl (TMS), triethyl (TES) and t‐butyldimethyl silyl (TBS) ethers from benzylic, allylic, propargylic alcohols, phenols, naphtholes and some of phenolic drugs in the solution and under solvent‐free conditions.