Sumitomo Chemical Company, Limited

Hiroshi Yoshihara

Tadatoshi Aratani

Gohfu Susukamo

Gohfu Suzukamo

Kenji Saito

Mitsuhisa Tamura

Kazuhiko Hamada

Kazuhiko Takahashi

Shinzaburo Masaki

Tetsuo Takano

Masahito Sekiguchi

Takeshi Yamahara

Kazuya Minamisaka

Takashi Kawai

Process for producing 5-amino-3-methylpyrazole

A chiral copper complex which is produced by the reaction of a chiral copper complex of the formula: ##STR1## wherein R.sub.1 is (a) alkyl group, or (b) aralkyl group; R.sub.2 is (a) 2-alkoxyphenyl group, or (b) 2-alkoxy-5-alkylphenyl group; either one of X.sub.1 and X.sub.2 is (a) hydrogen atom, (b) halogen atom, (c) alkyl group, (d) alkoxy group, or (e) nitro group, or adjacent X.sub.1 and X.sub.2 together form a benzo group, with a mono-substituted hydrazine of the formula:

Asymmetric synthesis of cyclopropanecarboxylate derivatives using chiral

A chiral copper complex which is produced by the reaction of a chiral copper complex of the formula: ##STR1## wherein R.sub.1 is (a) alkyl group, or (b) aralkyl group; R.sub.2 is (a) 2-alkoxyphenyl group, or (b) 2-alkoxy-5-alkylphenyl group; either one of X.sub.1 and X.sub.2 is (a) hydrogen atom, (b) halogen atom (c) alkyl group, (d) alkoxy group, or (e) nitro group, or adjecent X.sub.1 and X.sub.2 together form a benzo group, with a mono-substituted hydrazine of a formula:

Chiral copper complex

A process for producing 5-halomethylfurfural represented by the formula, ##STR1## wherein X is Cl or Br, which comprises carrying out a acid-decomposition of saccharide in a water/organic solvent/magnesium halide system with hydrochloric acid, sulfuric acid, hydrogen chloride or other mineral acid in the presence or absence of surface active agent as a catalyst. The 5-halomethylfurfural is useful as an intermediate of medicines, agricultural chemicals, perfumes and the like.

Process for producing 5-halomethylfurfural

Phenols can be produced in a high yield together with useful aldehydes by cleaving a secondary alkylbenzene hydroperoxide in the presence of sulfur, a sulfur oxide or a phosphorus sulfide and then separating the desired phenols from the cleavage product.

Process for producing phenols

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Takatsuki, Japan

Hiroshi Yoshihara