Ube Industries, Inc.

Soda Aromatic Co., Ltd.

Soda Aromaic Co., Ltd.

Noboru Kakeya

Hiroshi Yoshida

Kiyoshi Fukui

Masanori Kashiwagi

Hiroshi Jibiki

Kikuo Ataka

Yasushi Yamamoto

Tetsuro Tsuji

Mitsushi Taguchi

Fumio Matsuo

Jun Haruta

Junichiro Kita

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&#xb0; C. and lower than 250&#xb0; 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. Preferably, the palladium compound-containing catalyst in the starting mixture is dissolved in the phthalic acid diester, the palladium compound-containing catalyst comprises a palladium compound, a bidentate ligand and a copper compound, the reactor consists of a plurality of serially connected reactors and a carboxylic acid is also continuously or intermittently supplied to the reactor.

Process for production of biphenyltetracarboxylic acid tetraesters

.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.

.omega.-hydroxy-(.omega.-3)-ketonitrile

There are disclosed (i) .omega.-hydroxy-(.omega.-3)-ketonitrile represented by the formula ( I ):

.omega.-hydroxy-(.omega.-3)-ketonitrile and method for preparing

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:

.alpha.-(.omega.-cyanoalkanoyl)-.gamma.-butyrolactone and method for

.alpha.-(.omega.-cyanoalkanoyl-.gamma.-butyrolactone and method for

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.

Process for preparing 1,2,4-triazole-3-carboxamides

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.

Orotic acid derivatives

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.

Hydantoin derivatives

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.

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Ube, Japan

Noboru Kakeya