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 very efficient and mild procedure for preparation of silyl ethersfrom benzylic, allylic, propargilic alcohols, phenols, naphtoles and some of phenolic drugs with trimethylsilylchloride (TMSCl), triethylsilylchloride (TESCl) and t‐buthyldimethylsilyl chloride (TDSCl) ethers in the presence of Fe(HSO4)3/Et3N in room temperature in excellent yields is reported. This procedure also allows the excellent
在存在下,由苄基,烯丙基,丙二醇,苯酚,萘酚和某些酚类药物与三甲基氯硅烷(TMSCl),三乙基氯硅烷(TESCl)和叔丁基二甲基甲硅烷基氯(TDSCl)醚一起制备甲硅烷基醚的非常有效且温和的方法据报道,在室温下Fe(HSO 4)3 / Et 3 N具有极好的收率。该方法还使醇和酚的甲硅烷基化具有极好的选择性。
Metabolism of Nitrodiphenyl Ether Herbicides by Dioxin-Degrading Bacterium <i>Sphingomonas wittichii</i> RW1
作者:Young Soo Keum、Young Ju Lee、Jeong-Han Kim
DOI:10.1021/jf801362k
日期:2008.10.8
Nitrodiphenyl etherherbicides, including chlomethoxyfen, nitrofen, and oxyfluorfen are potent herbicides. Some metabolites and parent compounds are considered as possible mutagens and endocrine disruptors. Both properties pose serious hygienic and environmental risks. Sphingomonas wittichii RW1 is a well-known degrader of polychlorinated dibenzo- p-dioxins, dibenzofurans, and diphenylethers. However,