检索结果-南通市图书馆

Direct palladium/copper oxidative cross-coupling of α-methylstyrene with acrylates

Science China Chemistry 2010年第9期53卷 1927-1931页

作者： AL-MAKSOUD Walid DJAKOVITCH Laurent JAHJAH Mohamad PINEL Catherine Université de Lyon CNRSUMR 5256IRCELYONInstitut de recherches sur la catalyse et l'environnement de Lyon

Fully palladium/copper catalytic oxidative cross-coupling of acrylates with α-methylstyrene was performed in a DMSO/AcOH(1:1) mixture at 60℃ in the air.This improves previous procedures which employed stoichiometric amounts of copper and oxygen.Thus various acrylates were effectively coupled to α-methylstyrene giving the expected compounds in moderate to good yields(44%-65%) as a mixture of E and Z isomers.

关键词： direct cross-coupling oxidative couplings palladium copper catalytic procedures olefin cross-coupling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preparation and Catalytic Properties of Various Oxides and Mesoporous Materials Containing Niobium and Sulfate Ions, in the Etherification Reaction of 2-Naphtol

引用

International Journal of Organic Chemistry 2018年第1期8卷 16-40页

作者： Alaa H. Hussein Hiba Nahas mohamad jahjah Mourtada Srour Rabih jahjah Nicolas Duget Marc Lemaire Daoud Naoufal Laboratoire de Chimie de Coordination Inorganique et Organométallique (LCIO) Université Libanaise Faculté des Sciences I Hadath Liban Ecole Doctorale des Sciences et Technologie EDST PRASE Université Libanaise Hadath Liban Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS) UMR 5246 CNRS Université Claude Bernard Lyon 1 Villeurbanne France

Several types of solid acid catalysts were prepared based on oxides like (ZrO2, TiO2, HfO2, MCM-41 and SBA-15), using two main preparation methods: the precipitation and the sol-gel methods. Each catalyst was subjected to two types of impregnations: sulfate ions using sulfuric acid as precursor and niobium using niobium oxalate as precursor. These prepared catalysts were tested in the etherification reaction of 2-naphtol, where the catalysts showed both acidic and redox properties. The acidic character was manifested through the formation of 2-butoxynaphtalene (with moderate yields) when oxide is sulfated, and the redox character (when impregnated with niobium) manifested through the formation of the interesting product 2-ethylnaphtofuran (with low yields) and other products that were a result of oxidative coupling of two 2-naphtol molecules (binol and acetal of binol). However despite the effort, several attempts to increase the yield of 2-ethylnaphtofuran did not work. All products prepared were obtained in pure form and characterized by 1H and 13C NMR, GC and MS.

关键词： Sulfated Oxides Mesoporous Materials Niobium Solid Acid Catalysis Etherification

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Catalytic Properties of Various Oxides and Mesoporous Materials Containing Niobium and Sulfate Ions, in the Oxidation Reaction of 1-Octanol

引用

International Journal of Organic Chemistry 2018年第1期8卷 41-53页

作者： Alaa H. Hussein Ahmad Khalil mohamad jahjah Mourtada Srour Rabih jahjah Nicolas Duget Marc Lemaire Daoud Naoufal Laboratoire de Chimie de Coordination Inorganique et Organométallique (LCIO) Université Libanaise Faculté des Sciences I Hadath Liban Ecole Doctorale des Sciences et Technologie EDST PRASE Université Libanaise Hadath Liban Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS) UMR 5246 CNRS Université Claude Bernard Lyon 1 Villeurbanne France

Several types of solid acid catalysts were prepared based on oxides like (ZrO2, TiO2, HfO2, MCM-41 and SBA-15). Each catalyst was subjected separately to two types of impregnations: sulfate ions and niobium. The catalytic activity of these solids was tested in the oxidation reaction of 1-octanol. These catalysts showed acidic and redox characters. MCM-41 and SBA-15 materials showed higher redox catalytic activities through the formation of (octyl octanoate, peroxyacetal and octanal). Our interest was focused on obtaining the ester (octyl octanoate) with high yields.

关键词： MCM-41 SBA-15 Niobium Sulfated Oxide Oxidation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：