Clay Supported Ammonium Nitrate “Clayan”: A Mild and Highly Selective Reagent for the Deoximation of Electron Rich Oximes
摘要:
A simple and convenient method for selective deoximation of electron rich oximes is described using Clay supported ammonium nitrate "Clayan". Self destroying nature of the reagent makes the procedure attractive and eco-friendly.
CuFe2O4Nanoparticle Mediated Method for the Synthesis of 5-Substituted 1H-Tetrazoles from (E)-Aldoximes
作者:Ravi Kumar Akula、Chandra S. Adimulam、Sathaiah Gangaram、Raju Kengiri、Narsaiah Banda、Shanthan R. Pamulaparthy
DOI:10.2174/1570178611666140210213157
日期:2014.4
A strategy for the synthesis of 5-substituted 1H-tetrazoles from various (E)-aldoximes and sodium azide was
adopted using copper ferrite nanoparticles as a reusable catalyst.
the water-soluble ligand sulfoxantphos were used as the catalyst system, providing high regioselectivities in the initial hydroformylation. A mixture of water and 1-butanol was used as an environmentallybenignsolventsystem, ensuring sufficient contact of the aqueous catalyst phase and the organic substrate phase. The reaction conditions were systematically optimised by Design of Experiments (DoE) using
通过加氢甲酰化和随后的醛中间体与羟胺水溶液的一锅法缩合,成功地实现了直接从烯烃开始的醛糖肟合成。金属配合物Rh(acac)(CO)2和水溶性配体亚砜基磷用作催化剂体系,在初始加氢甲酰化反应中具有很高的区域选择性。将水和1-丁醇的混合物用作对环境无害的溶剂体系,以确保水性催化剂相与有机底物相充分接触。通过使用1-辛烯作为模型底物的实验设计(DoE),系统地优化了反应条件。所需线性末端醛肟的产率为85%((E / Z)-壬醛肟)的区域选择性达到95%。在优化的条件下,其他末端烯烃也成功地转化为相应的线性醛肟,包括可再生底物。通过记录气体消耗来研究反应速率的差异,从而使周转频率(TOF)> 2000 h -1分别观察到4-乙烯基环己烯和苯乙烯。通过使用醛肟脱水酶作为生物催化剂将醛肟肟转化为相应的线性腈,表明醛肟作为平台中间体的潜力很大。因此,整个反应序列允许由烯烃直接合成线性腈,而水是唯一的副产
Efficient Beckmann rearrangement and dehydration of oximes via phosphonate intermediates
Under mild conditions, conversion of a variety of ketoximes and aldoximes to their corresponding amides and nitriles proceeded in the presence of diethyl chlorophosphate with excellent yields.
A room temperature-curable organopolysiloxane composition is disclosed, comprising (A) 100 parts by weight of an organopolysiloxane terminated with a silanol group or an alkoxy group, (B) from 0.1 to 30 parts by weight of an organosilicon compound containing more than 2, in average, of hydrolyzable groups bonded to the silicon atom per molecule, (C) from 0.5 to 50 parts by weight of a hydroxyl-containing organic compound capable of swelling a polyolefin resin and, if desired, (D) a requisite amount of a curing catalyst. The composition exhibits satisfactory adhesion to an untreated polyolefin resin to provide sufficient adhesive strength for withstanding practical use.
Method of making silver-containing dispersions with nitrogenous bases
申请人:Eastman Kodak Company
公开号:US10246561B1
公开(公告)日:2019-04-02
A method is used to prepare silver nanoparticle cellulosic polymer composites. A cellulosic polymer, reducible silver ions in an amount of a weight ratio to the cellulosic polymer of 5:1 to 50:1, and an organic solvent are mixed. Each organic solvent has a boiling point at atmospheric pressure of 100° C. to 500° C. The Hansen parameter (δTPolymer) of the cellulosic polymer is less than or equal to the Hansen parameter (δTSolvent) of the organic solvent. The resulting premix solution is heated to at least 75° C., and a (d) nitrogenous base is added to provide a concentration of the nitrogenous base in an equimolar amount or in molar excess in relation to the amount of reducible silver ions, thereby forming a silver nanoparticle cellulosic polymer composite. After cooling, the silver nanoparticle cellulosic polymer composite is isolated and re-dispersed in an organic solvent to provide a non-aqueous silver-containing dispersion.