Nippon Soda Co., Ltd.

Yoshikazu Ito

Hiroki Inoue

Shinichi Kobayashi

Takashi Kitayama

Yuzuru Sakata

Tsutomu Inoue

Yasushi Kubota

Tadashi Sugiura

Tatsumi Suzuki

The present invention provides a halogenated aniline represented by formula (I) (wherein each of Xand Xindependently represents a chlorine atom, a bromine atom or an iodine atom), a method for producing the halogenated aniline, and other aspects. 

Halogenated aniline and method for producing same

Disclosed herein are optically active biphenol derivatives represented by the following formulas (1) and (2), a method for optically resolving a biphenol derivative represented by formula (2'), a production method of an optically active biphenol derivative (1) comprising a step for reacting a Br&#xf8;nsted acid with a biphenol derivative (2), and a production method of an optically active biphenol derivative (3) comprising a step for reacting a Lewis acid with an optically active biphenol derivative (1) or an optically active biphenol derivative (2). 

Optically active 2,2'-biphenol derivative and production method of same

The present invention provides a process for preparation of 1-alkyl-5-benzoyl-1H-tetrazole derivative including a step 1 of reacting a ketoamide derivative represented by formula (I) (in formula (I), A represents a halogen atom or the like; n represents an integer of 0 to 5; Y represents an alkyl group) with a halogenating agent to obtain an imidoyl halide derivative represented by formula (II) (in formula (II), A, n and Y are as defined above; X represents a halogen atom); and a step 2 of reacting the imidoyl halide derivative represented by formula (II) with an azide represented by formula (III) (in formula (III), M represents an alkali metal or the like; m represents 1 or 2) to obtain a 1-alkyl-5-benzoyl-1H-tetrazole derivative represented by formula (IV) (in formula (IV), A, n and Y are as defined above). 

Process for preparation of 1-alkyl-5-benzoyl-1H-tetrazole derivatives

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Takaoka, Japan

Yoshikazu Ito