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.
A Convenient Method for Protection and Deprotection of Alcohols and Phenols as Alkylsilyl Ethers Catalyzed by Iodine Under Microwave Irradiation
作者:Ira Saxena、Nabajyoti Deka、Jadab C. Sarma、Sadao Tsuboi
DOI:10.1081/scc-120026335
日期:2003.12.1
Abstract Irradiation of alcohols or phenols with tert-butyldimethylsilyl chloride (TBDMSCl) or trimethylsilyl chloride (TMSCl) in presence of catalytic amount (20 mol%) of iodine in a microwave oven for 2 min gives the corresponding silyl ethers in excellent yield. Iodine in methanol deprotects the silyl ether into its parent alcohol or phenol under similar reaction conditions.
Substituent Effects on the Reactivity of the Silicon−Carbon Double Bond. Resonance, Inductive, and Steric Effects of Substituents at Silicon on the Reactivity of Simple 1-Methylsilenes
作者:William J. Leigh、Rabah Boukherroub、Corinna Kerst
DOI:10.1021/ja981435d
日期:1998.9.1
-diazomethanes leads to the formation of reactive silenes which can be detected directly in solution, allowing detailed studies of the kinetics and mechanisms of their reactions with nucleophiles. Over 30 transient silenes have now been studied by these methods, providing the opportunity to systematically assess the effects of substituents at silicon and carbon on the reactivity of the Si=C bond.
Alcohols, phenols and carboxylic acids are silylated with very good yields in the presence of silyl methallylsulfinates under non-basic conditions and with the formation of volatile co-products.
Boron Compounds; 69<sup>1</sup>. Introduction and Removal of<i>t</i>-Butyldimethylsilyl Groups via Diethylboryloxy Compounds
作者:Wilhelm V. Dahlhoff、Kalulu M. Taba
DOI:10.1055/s-1986-31703
日期:——
O-Diethylboryl compounds react with t-butyldimethylsilylacetylacetonate in the presence of trimethylsilyl triflate at room temperature to give the corresponding t-butyldimethylsilyl ethers, which are easily deprotected, forming O-diethylboryl ethers on reaction with tetraethyldiboroxane.