Synthesis, Crystal Structure, and Insecticidal Activity of Novel N-Alkyloxyoxalyl Derivatives of 2-Arylpyrrole
摘要:
Two series of novel N-alkyloxyoxalyl derivatives of 2-arylpyrrole were synthesized, and their structures were characterized by (1)H NMR spectroscopy, elemental analysis, and single-crystal X-ray diffraction analysis. The insecticidal activities of the new compounds were evaluated. The results of bioassays indicated that some of these title compounds exhibited excellent insecticidal activities, and their insecticidal activities against oriental armyworm, mosquito, and spider mite are comparable to those of the commercialized Chlorfenapyr.
Template-free sol–gel synthesis of high surface area mesoporous silica based catalysts for esterification of di-carboxylic acids
作者:Pavan M. More、Shubhangi B. Umbarkar、Mohan K. Dongare
DOI:10.1016/j.crci.2016.02.001
日期:2016.10
Résumé High surface area mesoporous silica based catalysts have been prepared by a simple hydrolysis/sol–gel process without using any organic template and hydrothermal treatment. A controlled hydrolysis of ethyl silicate-40, an industrial bulk chemical, as a silica precursor, resulted in the formation of very high surface area (719 m2/g) mesoporous (pore size 67 Å and pore volume 1.19 cc/g) silica. The formation of mesoporous silica has been correlated with the polymeric nature of the ethyl silicate-40 silica precursor which on hydrolysis and further condensation forms long chain silica species which hinders the formation of a close condensed structure thus creating larger pores resulting in the formation of high surface mesoporous silica. Ethyl silicate-40 was used further for preparing a solid acid catalyst by supporting molybdenum oxide nanoparticles on mesoporous silica by a simple hydrolysis sol–gel synthesis procedure. The catalysts showed very high acidity as determined by NH3-TPD with the presence of Lewis as well as Brønsted acidity. These catalysts showed very high catalytic activity for esterification; a typical acid catalyzed organic transformation of various mono- and di-carboxylic acids with a range of alcohols. The in situ formed silicomolybdic acid heteropoly-anion species during the catalytic reactions were found to be catalytically active species for these reactions. Ethyl silicate-40, an industrial bulk silica precursor, has shown a good potential for its use as a silica precursor for the preparation of mesoporous silica based heterogeneous catalysts on a larger scale at a lower cost.
[EN] IONIC LIQUIDS BASED ON OXALIC ACID MONO ESTERS<br/>[FR] LIQUIDES IONIQUES À BASE DE MONOESTERS DE L'ACIDE OXALIQUE
申请人:BASF SE
公开号:WO2014056844A1
公开(公告)日:2014-04-17
Monosubstituted oxalic acid derivatives of the general formula (I) [A]+[O-C(O)-C(O)-O-X]-, wherein the meaning is: for [A]+, a cation made from an organic moiety A having a formally positively charged heteroatom selected from the group consisting of nitrogen, phosphorus and sulfur, X is a C1 to C30 organic residue, and wherein the following compounds (I) are disclaimed:tetramethylammonium monomethyloxalate methyltri(alkyl)ammonium monomethyloxalate trimethyl(1-hydroxyethyl)ammonium monomethyloxalate methyltriethylammonium monomethyloxalate tetraethylammonium monomethyloxalate n-propyltriethylammonium mono-n-propyloxalate n-butyltriethylammonium mono-n-butyloxalate benzyltriethylammonium monobenzyloxalate cyclohexyldimethylammonium monomethyloxalate dimethyl-phenylammonium monomethyloxalate. Tetrabutylammonium monomethyloxalate N-methylpyridinium monomethyloxalate N-ethylpyridinium monoethyloxalate N-n-propylpyridinium mono-n-propyloxalate N-n-butylpyridinium mono-n-butyl-oxalate N-benzylpyridinium monobenzyloxalate N-methyl-isochinolinium monomethyloxalate N-ethyl-isochinolinium monoethyloxalate N-n-propyl-isochinoliniummono-n-propyloxalate N-n-butyl-isochinolinium mono-n-butyloxalate N-benzyl-isochinolinium monobenzyloxalate.
[DE] VERFAHREN ZUR HERSTELLUNG HETEROCYCLISCHER QUARTÄRER AMMONIUM- UND/ODER GUANIDINIUM-VERBINDUNGEN<br/>[EN] METHOD FOR PRODUCING HETEROCYCLIC QUATERNARY AMMONIUM AND/OR GUANIDINIUM COMPOUNDS<br/>[FR] PROCEDE POUR PRODUIRE DES COMPOSES AMMONIUM ET/OU GUANIDINIUM QUATERNAIRES HETEROCYCLIQUES
申请人:BASF AG
公开号:WO2006027069A1
公开(公告)日:2006-03-16
Verfahren zur Herstellung eines, ein heterocyclisches quartäres Ammonium- und/oder Guanidinium-Kation enthaltenden Zwischenprodukts für die Synthese heterocyclischer quartärer Ammonium- und/oder Guanidinium-Verbindungen, bei dem man heterocyclische quartäre Ammonium- und/oder Guanidinium-carboxylate mit einem oxidierenden Agens in Gegenwart eines Metalls aus der 8. bis 10. Gruppe des Periodensystems bei einer Temperatur von 0 bis 250°C und einem Druck von 0,05 bis 20 MPa abs oxidiert.
[DE] VERFAHREN ZUR HERSTELLUNG HETEROCYCLISCHER QUARTÄRER AMMONIUM-VERBINDUNGEN UND/ODER GUANIDINIUM-VERBINDUNGEN HOHER REINHEIT<br/>[EN] METHOD FOR THE PRODUCTION OF HETEROCYCLIC QUATERNARY AMMONIUM COMPOUNDS AND/OR GUANIDINE COMPOUNDS HAVING HIGH PURITY<br/>[FR] PROCEDE POUR PRODUIRE DES COMPOSES AMMONIUM ET/OU GUANIDINIUM QUATERNAIRES HETEROCYCLIQUES DE GRANDE PURETE
申请人:BASF AG
公开号:WO2006027070A1
公开(公告)日:2006-03-16
Verfahren zur Herstellung heterocyclischer quartärer Ammonium-Verbindungen und/oder Guanidinium-Verbindungen, bei dem man das Carboxylat des entsprechenden heterocyclischen quartären Ammonium-Kations und/oder Guanidinium-Kations, welches das Carboxylat-Anion der allgemeinen Formel R'-COO- (I), in der R' • Wasserstoff; • C1- bis C7-Alkyl; • -OOC-(CH2)n- mit n gleich 0, 1 oder 2; • R'OOC-(CH2)n- mit n gleich 0, 1 oder 2; • -OOC-CH=CH-; • R'OOC-CH=CH-; • Ethenyl; • 2-Propenyl; oder • eine unsubstituierte oder durch eine bis fünf unabhängig voneinander aus-gewählte Gruppen aus der Reihe C1- bis C6-Alkyl, Hydroxy, Carboxylat (-COO-), Carboxy (-COOH) und C1- bis C6-Alkyloxycarbonyl (-COOR# mit R# gleich C1- bis C6-Alkyl) substituierte Phenylgruppe und R' Wasserstoff oder C1- bis C6-Alkyl; bedeuten, enthält, mit einer anorganischen oder organischen Protonensäure mit einem pKa-Wert von ≤ 14, gemessen bei 25°C in wässriger Lösung, umsetzt.
Selective monoetherification and monoesterificatton of diols and diacids under phase-transfer conditions
作者:Jaime de la Zerda、Gabriela Barak、Yoel Sasson
DOI:10.1016/0040-4020(89)80151-6
日期:1989.1
Research on the selectivity of etherlfication reactions of diols and esterification reactions of diacids by alkyl halides underphase-transfer catalysis has shown that under such conditions, selectivity of monoetherification increases in the order prim < sec < tert diols, though overall yield of monoether decreases from sec to tert diols. Monoesterification of diacids was accomplished with a high degree