Abstract:
The invention is dealing with arylindane-1,3-diones of the formula: ##STR1## which can be used in the treatment of inflammatories, psoriasis and asthma.
Abstract:
Monomethyl-substituted methylene compounds are obtained by reacting methylene compounds of the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent --CN, --CO--R.sup.3, --SO.sub.2 --R.sup.3 or --NO.sub.2 andR.sup.1 can additionally denote -aryl(R.sup.1).sub.n,whereinR.sup.3 denotes --OH, alkyl, aralkyl, aryl, alkoxy, aralkoxy or aryloxy, or amino which is substituted by alkyl and/or aralkyl and/or aryl, and furthermoretwo radicals R.sup.3 together can be an alkylene group, the radical of an aliphatic diol or of an aliphatic diamine or the group --NH--CO--NH-- and n represents 1, 2 or 3,with formaldehyde and with hydrogen in the presence of a condensation catalyst and a hydrogenation catalyst at elevated temperature, the methylene compound being introduced into the liquid phase of the mixture of reactants in the course of the reaction.
Abstract:
A macrocyclic compound represented by the following general formula: ##STR1## and a process for preparing thereof which comprises reacting an .alpha.,.omega.-dihalogenated hydrocarbon and an active methylene compound with a base in a solvent to obtain a macrocyclic compound represented by the following general formula (II): ##STR2## and then inducing the functional group of Y.sup.1, Y.sup.3 and Y.sup.5 by means of a hydrolysis, oxidation or such, and an uranyl ion capturing agent comprising a polymer chemically bonded to a functional group in a macrocyclic compound and preparation thereof.
Abstract:
Benzene is efficiently nitrated in gaseous phase with NO.sub.2 or N.sub.2 O.sub.4 in the presence of a catalyst of acidic mixed oxide containing two or more sorts of metal oxides, for example, MoO.sub.3 --WO.sub.3, MoO.sub.3 --TiO.sub.2, WO.sub.3 --TiO.sub.2, TiO.sub.2 --ZnO or TiO.sub.2 --SiO.sub.2.
Abstract:
Carboxylic acids having the general formula:R--COOHwherein R is selected from the group consisting of aryl, aralkyl, aralkenyl, aralkynyl, heteroaryl, heteroarylalkyl, heteroarylalkenyl, heteroarylalkynyl, alkyl, alkenyl and alkynyl, optionally substituted by inert or non-reactive substituents under the reaction conditions, are obtained by oxidation of the corresponding aldehydes with an alkali metal or alkaline-earth metal chlorite in the presence of hydrogen peroxide and in an aqueous-organic solvent. The resulting carboxylic acids are utilizable as intermediates for preparing fine chemicals in known ways.
Abstract:
Improvement in the process for preparing biaryl compounds via coupling of an arylamine with an arene in the presence of a nitrite, an acid and copper metal or a derivative thereof; the improvement is consisting in adding to the reaction mixture a trialkylorthoformate. The process may be used for preparing drugs such as Flurbiprofen and Xenbucin or intermediate compounds particularly useful for preparing Flurbiprofen, Flufenisal, Chlordimorin, Xenbucin, Xenysalate, Xenyhexenic acid and the like.
Abstract:
Compounds of the formulaeZ--CH.dbd.CH--Z.sub.1 (Ia) or CH.sub.2 .dbd.CH--Z.sub.2 --CH.dbd.CH.sub.2 (Ib),in which Z represents unsubstituted or substituted phenyl or naphthyl, Z.sub.1 represents hydrogen or has the same meaning as Z and Z.sub.2 represents unsubstituted or substituted phenylene, naphthylene or p-biphenylene or an unsubstituted or substituted stilbene radical, can be obtained in a simple and economical manner in accordance with a novel process by reacting ethylene, under a pressure of 0.1 to 20 bar, in the presence of a base and with the addition of specific palladium catalysts, such as palladium acetate, with appropriate acid halides. The compounds of the formulae Ia and Ib are valuable intermediates, in particular for the preparation of fluorescent brighteners or scintillators.
Abstract:
Substituted benzophenones of the formula ##STR1## in which Ph represents unsubstituted or substituted phenyl and R represents free, esterified or amidated carboxy, have anti-inflammatory and/or analgesic properties and can be used as active ingredients in medicaments. They are manufactured, for example, as follows:a compound or a mixture of compounds of the formula ##STR2## in which X.sub.1 and X.sub.2 together represent a group of the formula --C(.dbd.O)--O that is bonded via the carbonyl group to the radical Ph and X.sub.3 represents hydrogen, or one of the radicals X.sub.1 and X.sub.3 represents a group of the formula --C(.dbd.O)--Z, the other represents hydrogen and X.sub.2 represents a group R'O-- in which R' represents hydrogen or a hydroxy-protecting group, is subjected to acid treatment and the primary product is decomposed solvolytically.
Abstract:
A process for selectively forming nitroalkanes and nitroaromatics by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an organic carboxylic acid having from two to ten carbon atoms with NO.sub.2 alone or in the presence of oxygen and/or water.
Abstract:
A process is disclosed for preparing a diester of oxalic acid by contacting carbon monoxide and an ester of nitrous acid in the vapor state under a pressure in the presence of a supported palladium monolith catalyst.