Sagami Chemical Research Center

Toyo Soda Manufacturing Co., Ltd.

Dainippon Ink and Chemicals, Incorporated

Sumitomo Pharmaceuticals Company Limited

Nippon Steel Chemical Co., Ltd.

Kawamura Institute of Chemical Research

Tamejiro Hiyama

Yoshiyuki Kikuchi

Kiyohide Matsui

Etsuko Tobita

Toru Seita

Takeshi Kuriyama

Kiyoshi Kondo

Sadao Takehara

Shiro Terashima

Toru Fujisawa

Kunikazu Sakai

Hiroyuki Watanabe

Kayoko Nakamura

Yoshikazu Kimura

Akira Akimoto

Yoshio Ito

Akiko Nakayama

Kiyoharu Nishide

Takeshi Hanamoto

Tatsuya Minami

Guntoori B Reddy

Makoto Sunagawa

Tetsuo Kusumoto

Kiyosi Kondo

Yasuhisa Asano

Masashi Osawa

Akira Sasaki

Tadao Shoji

Katsumi Tamoto

Shuichi Mitamura

Makoto Fujita

Kusumoto, Tetsuo

Takeo Kawabata

Hiroshi Kajiro

Kazuhiro Kobayashi

Process for preparing indan derivatives

The present invention provides optically active esters of 7-substituted 3,5-difunctionalized 6-heptenoic acids represented by the following formula: ##STR1## wherein R is a substituted or unsubstituted aromatic group, a substituted or unsubstituted heteroaromatic group or a substituted vinyl group;

Optically active esters of 7-substituted 3,5-difunctionalized

A compound of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen atom, a lower alkyl group, an ar(lower)alkyl group or an aryl group, or R.sub.1 and R.sub.2 may be combined together to form a lower alkylene group and/or R.sub.3 and R.sub.4 are combined together to form a lower alkylene group, or R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be combined together to form an o-phenylene group, X is a halogen atom and Y is an oxygen atom or a nitrogen atom substituted with lower alkyl or aryl, which is useful as an intermediate in the synthesis of 1.beta.-methylcarbapenem compounds valuable as antibiotics.

Heterocyclic compounds and their production

The present invention discloses an optically active compound represented by the following general formula (I): ##STR1## wherein R.sup.1 represents an alkyl, alkoxyl, or alkoxyalkanoyloxy group which has 1 to 18 carbon atoms and may be substituted with fluorine, chlorine, or cyano group; R.sup.2 represents an alkyl group having 1 to 18 carbon atoms; ##STR2## m is 0 or 1; Y represents a single bond, --CH.sub.2 O--, or --COO--; Z represents a single bond or --COO--; and C* and C** each independently represents an asymmetric carbon atom of the (R) and (S) configuration, an intermediate therefor being represented by the following general formula (II): ##STR3## wherein R.sup.2 represents an alkyl group having 1 to 18 carbon atoms, n is 0 or 1, and C* and C** each independently represents an asymmetric carbon atom of the (R) or (S) configuration, a process for producing the intermediate, and a liquid-crystal compound using the optically active compound.

Optically active compound, intermediate therefor, process for producing

An optically active lactone derivative represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a straight-chain or branched alkyl, alkoxyl, alkanoyloxy, alkoxycarbonyl, alkoxyalkyl, alkoxyalkanoyloxy, or alkoxyalkoxyl group having 1 to 20 carbon atoms or an optically active group of each of the above kinds, R.sup.2 represents a straight-chain or branched alkyl group having 1 to 20 carbon atoms, ##STR2## or trans-1,4-cyclohexylene group of the formula and the asymmetric carbon atoms at the 2- and 4-positions in the lactone ring each independently is of the (S) or (R) configuration, an intermediate therefor, a process for producing the intermediate, a liquid-crystal composition, and a liquid-crystal display device.

Optically active lactone derivative, intermediate therefor, process for

An amino acid derivative of the formula: ##STR1## wherein R.sup.1 is a protective group for hydroxyl, which is useful as an intermediate for production of antimicrobial agent.

Amino acid derivatives, and their production

A 2,2-dimethylcyclopropanecarboxylic acid derivative having the formula: ##STR1## wherein R.sup.1 is an alkyl group or an aryl group, R.sup.2 is a hydrogen atom, an acyl group, a sulfonyl group or an alkyl group, and each of X.sup.1 and X.sup.2 is a halogen atom.

2,2-Dimethylcyclopropane-carboxylic acid derivatives

A fluorocarbon polymer comprising a perfluorocarbon main chain and a pendant chain attached to the main chain, characterized in that the pendant chain has a quaternary ammonium type terminal group.

Fluorocarbon polymers and processes for their preparation

A fluorocarbon anion exchanger which is composed of a fluorocarbon polymer comprising a perfluorocarbon main chain and a pendant chain attached to the main chain, characterized in that the pendant chainhas a terminal group represented by the formula: ##STR1##

Fluorocarbon anion exchangers and processes for their preparation

Aminopolyol derivatives

A process for preparing a trifluorovinylsilane represented by the general formula:

Process for the preparation of a trifluorovinylsilane, and

Growing community of inventors

Sagamihara, Japan

Tamejiro Hiyama