Abstract: The present invention is to provide a process for preparing an ?-cyanoaldehyde compound which comprises bringing a 2-alkoxycycloalkanone oxime compound into contact with a solid acid(s).

Abstract: A production process, especially a continuous production process, for a biphenyltetracarboxylic acid tetraester characterized by carrying out, in parallel, a step of preliminarily mixing a phthalic acid diester and a palladium compound-containing catalyst to prepare a starting mixture, a step of continuously or intermittently supplying the starting mixture to a reactor, a step of conducting oxidative dimerization reaction of the phthalic acid diester in a temperature range of from 140° C. and lower than 250° C. while supplying molecular oxygen to the reactor to form a reaction mixture in the reactor, and a step of continuously or intermittently removing a portion of the reaction mixture from the reactor.

Abstract: A production process, especially a continuous production process, for a biphenyltetracarboxylic acid tetraester characterized by carrying out, in parallel, a step of preliminarily mixing a phthalic acid diester and a palladium compound-containing catalyst to prepare a starting mixture, a step of continuously or intermittently supplying the starting mixture to a reactor, a step of conducting oxidative dimerization reaction of the phthalic acid diester in a temperature range of from 140° C. and lower than 250° C. while supplying molecular oxygen to the reactor to form a reaction mixture in the reactor, and a step of continuously or intermittently removing a portion of the reaction mixture from the reactor.

Abstract: .omega.-Hydroxy-(.omega.-3)-ketonitrile of the formula NC(CH.sub.2).sub.n --CO--(CH.sub.2).sub.3 OH wherein n is an integer of 7 to 11.

Abstract: There are disclosed (i) .omega.-hydroxy-(.omega.-3)-ketonitrile represented by the formula ( I ):NC(CH.sub.2).sub.n --CO--(CH.sub.2).sub.3 OH (I)wherein n is an integer of 7 to 11, (ii) a method for preparing the .omega.-hydroxy-(.omega.-3)-ketonitrile which comprises reacting .alpha.-(.omega.-cyanoalkanoyl)-.gamma.-butyrolactone represented by the formula (II): ##STR1## wherein n has the same meaning as defined above, in the presence of 1 to less than 2 mole of an alkali metal hydroxide per mole of the butyrolactone in an aqueous medium, and (iii) a method for preparing .omega.-hydroxy fatty acid represented by the formula (IV):HOOC(CH.sub.2).sub.n+4 --OH (IV)wherein n has the same meaning as defined above, which comprises reacting the above .omega.-hydroxy-(.omega.-3)-ketonitrile of the formula (I) with hydrazine in an aqueous solution of an alkali metal hydroxide.

Abstract: Disclosed are .alpha.-(.omega.-Cyanoalkanoyl)-.gamma.-butyrolactone represented by the formula: ##STR1## wherein n represents an integer of 7 to 11, and a method for producing the same, which comprises reacting .omega.-cyano fatty acid ester represented by the formula:NC--(CH.sub.2).sub.n --COOR (II)wherein R represents an alkyl group having 1 to 4 carbon atoms and n has the same meaning as in the above, with .gamma.-butyrolactone in the presence of alkali metal alcoholate represented by the formula:R'OM (III)wherein R' represents an alkyl group having 1 to 4 carbon atoms and M represents an alkali metal.

Abstract: Disclosed are .alpha.-(.omega.-Cyanoalkanoyl)-.gamma.-butyrolactone represented by the formula: ##STR1## wherein n represents an integer of 7 to 11, and a method for producing the same, which comprises reacting .omega.-cyano fatty acid ester represented by the formula:NC--(CH.sub.2).sub.n --COOR (II)wherein R represents an alkyl group having 1 to 4 carbon atoms and n has the same meaning as in the above, with .gamma.-butyrolactone in the presence of alkali metal alcoholate represented by the formula:R'OM (III)wherein R' represents an alkyl group having 1 to 4 carbon atoms and M represents an alkali metal.

Abstract: There is disclosed a process for preparing a 1,2,4-triazole-3-carboxamide represented by the formula: ##STR1## wherein, R.sup.1 and R.sup.2 represent independently a hydrogen atom, an alkyl group, a cycloalkyl group or an aryl group, or both R.sup.1 and R.sup.2 represent an alkylene group linked with each other directly or through an oxygen atom or a nitrogen atom to form a ring together with the nitrogen atom to which they are attached,which comprises subjecting an oxamohydrazide represented by the formula: ##STR2## wherein R.sup.1 and R.sup.2 have the same meanings as defined above,to reaction with formamidine or a salt thereof.

Abstract: Novel orotic acid derivatives useful as agricultural chemicals or intermediates thereof are disclosed. The orotic acid derivatives are represented by the formula ##STR1## where Me is an alkali metal, R.sup.1 is an alkyl group of from 1 to 4 carbon atoms, an allyl group, a cyclohexyl group, a benzyl group, or a group ##STR2## (where R.sup.2 is an alkyl group of from 1 to 4 carbon atoms, an alkoxyl group of from 1 to 4 carbon atoms or a halogen atom and n is 0, 1, 2 or 3), m is an integer of 1 or 2, and X is a chlorine, bromine or iodine atom or a group --COR.sup.0 (where R.sup.0 is an alkyl group of from 1 to 4 carbon atoms or a phenyl group) when m is 1, and a group --COO.sup.- when m is 2.

Abstract: Hydantoin derivatives disclosed in the present application are represented by the formula ##STR1## wherein, R.sup.1 represents a hydrogen atom, an alkyl group of from 1 to 4 carbon atoms, an allyl group, a cyclohexyl group, a benzyl group or a group ##STR2## (where R.sup.2 is an alkyl group of from 1 to 4 carbon atoms, an alkoxy group of from 1 to 4 carbon atoms, a halogen atom or a nitro group, and n is 0, 1, 2 or 3), X.sup.1 is an alkoxycarbonyl group of from 2 to 5 carbon atoms, a benzoyl group, an aliphatic acyl group of from 2 to 5 carbon atoms or a cyano group, and Y is an alkoxycarbonyl group of from 2 to 5 carbon atoms or an aliphatic acyl group of from 2 to 5 carbon atoms. The hydantoin derivatives are useful as agricultural chemicals e.g. bactericides or intermediates thereof.

Abstract: Triphenylphosphine is produced in a high degree of yield by bringing pressurized hydrogen into contact with a triphenylphosphine dihalide dissolved in a solvent consisting of at least one member selected from monochlorobenzene and dichlorobenzenes.