Fujifilm Corporation

Fuji Photo Film, Inc.

Fujilfilm Corporation

Daisuke Urazoe

Hideto Mori

Katsuyoshi Yamakawa

Akio Satoh

Masaharu Kitamura

A process for preparing a 3-aminophenylacetylene compound of formula (5), including: a) reacting a 3-haloaniline compound of formula (1) with an acetylene compound of formula (2) in the presence of a palladium compound, a copper compound, and an amine compound of formula (3) to form an aniline compound of formula (4); b) precipitating the aniline compound of formula (4) in the form of a crystal, and isolating it by solid/liquid separation; and c) reacting the aniline compound of formula (4) with a base to obtain 3-aminophenylacetylene.

Process for preparing 3-aminophenylacetylenes

The invention provides an aryl ethynyl phthalic acid and derivatives thereof (including fluorine-containing compounds) represented by Formulae 1, 3, 5, 4A and 5A including the structure of Formula 2, and method of producing these compounds, in which an aryl ethynyl phthalic anhydride is formed by subjecting an aryl phthalic acid to ring closing: 

Aryl ethynyl phthalic acid derivative and method for producing the same

There is disclosed a method for producing an N-alkyl-.alpha.-dialkylaminoacetohydroxamic acid compound represented by formula (2), which comprises reacting an .alpha.-dialkylaminoacetic acid ester compound represented by formula (1) with an N-alkylhydroxylamine, wherein the reaction is carried out in water and an ether-series organic solvent, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which are the same or different, each represents an alkyl group. According to the method, it is possible to obtain the objective compound in a high yield with a short reaction time, with restrained formation of a by-product.

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Kanagawa, Japan

Daisuke Urazoe