Mitsubishi Gas Chemical Company, Inc.

Shuzabu Sakaguchi

Osamu Aoki

Norio Takeda

Fumiya Zaima

Mutsuhiko Takeda

Takanari Nawata

Isao Hagiwara

Toshiaki Kohzaki

Masafumi Shimpo

Yoshiyuki Aoki

Tomiya Isshiki

Tetsuo Tomita

Novel methylthiophenol derivatives of the formula (I') and of the formula (IV) and processes for producing said derivatives ##STR1## wherein R is a tert-butyloxy group, a tert-amyloxy group, a p-methoxybenzyloxy group, a 2-(trimethylsilyl)ethoxy group, a 1-adamantyloxy group, a bornyloxy group, or an isobornyloxy group.

Methylthiophenol derivatives and p-methylthiophenyl chloroformates and

A process for producing sulfonium compounds represented by the general formula (III) which comprises reacting alkylthiophenol derivatives represented by the general formula (I) and dialkyl sulfate represented by the general formula (II).

Process for production of sulfonium compounds

Disclosed is process for producing a sulfonium compound of the general formula (III), comprising reacting alkylthiophenol derivative of the general formula (I) and dialkyl sulfate of the general formula (II) in the presence of at least one inorganic compound selected from the group consisting of alkali metal carbonate, alkali metal hydrogencarbonate, alkaline earth metal hydroxide, alkaline earth metal carbonate, and oxides of Group II metals of the Periodic Table. ##STR1## wherein all the symbols are as defined in the appended claims.

Process for production of sulfonium compounds and novel methylthiphenol

An improved process for producing benzophenone-azine in which a catalyst can be removed, recovered and recycled is disclosed. The process comprises the steps of:

Process for producing benzophenone-azine

A process for continuously preparing benzophenone-azines comprising oxidizing benzophenone-imines with molecular oxygen or a molecular oxygen-containing gas in the presence of a copper halide catalyst is disclosed. The oxidation reaction is carried out in a multistage system under an oxygen partial pressure gradually decreasing from the former stage to the latter stage and at a conversion gradually decreasing from the former stage to the latter stage, while controlling the conversion so that the molar ratio of the benzophenone-imines to the copper halide in the final stage be maintained at 1 or more. By the process, the continuous reaction can stably be performed at a high conversion of the benzophenone-imines without involving insolubilization and sedimentation of the catalyst.

Process for preparing benzophenone-azines

A process for preparing hydrazine hydrohalogenide is disclosed. The process comprises the steps of:

Process for preparing hydrazine hydrohalogenide

A process for producing a benzophenone-azine which comprises reacting the corresponding benzophenone-imine with molecular oxygen or benzophenone with ammonia and molecular oxygen in the presence of a catalyst selected from the group consisting of metals, metal oxides and alloys of two or more metals, particularly copper or copper alloy-containing catalyst, is disclosed.

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Tokyo, Japan

Shuzabu Sakaguchi