Mitsui Petrochemical Industries, Ltd.

Mitsui Pharmaceuticals, Inc.

Hiroyasu Ohno

Akira Awaya

Keiichi Yokoyama

Takuo Nakano

Takumi Kitahara

Kiyotaka Yorozu

Terunori Fujita

Teruaki Mukaiyama

Isao Hashimoto

Masayasu Ishibashi

Kazutoshi Horikomi

Kazunori Takahata

Ikuo Tomino

Hiroshi Iwasaki

Mikio Kumakura

Takashi Nishina

Shintaro Araki

Hisashi Kobayashi

Tadayuki Sasaki

Koji Kato

Shigeru Isayama

Hideo Oikawa

Kenji Shimamoto

Kazuyuki Watanabe

Noriyuki Hirowatari

Ken E Tan

Sakae Saruta

Kozi Kato

Method of purifying aromatic dicarboxylic acids

Process for producing aromatic hydroxylic compound

A process for producing an alkyl-substituted aromatic hydrocarbon, which comprises alkylating an aromatic hydrocarbon with an alkylating agent in the presence of a heteropoly-acid or a salt thereof such as phosphorus tungstate and silicon tungstate as a catalyst. The process is particularly useful for preparing alkyl-substituted naphthalene or naphthalene derivatives.

Process for producing alkyl-substituted aromatic hydrocarbon using

There is provided a novel organic hydroperoxide, 3-(2-hydroperoxy-2-propyl)phenol. The hydroperoxide is produced by oxidizing 3-(2-hydroxy-2-propyl)phenol or m-isopropenylphenol with hydrogen peroxide in the presence of an acid catalyst. There is further provided a method of producing resorcinol which comprises decomposing the 3-(2-hydroperoxy-2-propyl)phenol in the presence of an acid catalyst.

3-(2-hydroperoxy-2-propyl)phenol and method of producing resorcinol

Therapeutic agent for neurological diseases

Disclosed herein is an antihypertensive preparation containing, as an active component, a novel quinazoline derivative represented by the following general formula or a salt thereof: ##STR1## wherein R.sup.100 means a hydrogen atom or methoxy group, R.sup.200 and R.sup.300 denote individually a hydrogen atom or lower alkoxy group, R.sup.400 is a hydrogen atom or amino group, l stands for 2 or 3, and Het is a specific hetero ring group.

Quinazoline compounds and antihypertensives

Growing community of inventors

Hiroshima, Japan

Hiroyasu Ohno