Showa Shell Sekiyu Kabushiki Kaisha

Knc Laboratories Co., Ltd.

Showa Sheel Sekiyu Kabushiki Kaisha

Yoshihiro Takagi

Yoshiichi Suzuki

Katutoshi Hirose

Hiroyuki Mogamiya

Hiroya Koyama

Katsutoshi Hirose

Daisuke Yoshihara

Yoshinori Sawashita

Koichi Tanaka

Sota Kurita

Toshihiko Otomatsu

Hidekazu Imahori

Yoshihiro Ichihara

The present invention provides a novel intermediate for synthesizing vitamin D derivatives by using a less expensive material. That is, the present invention provides a compound which is synthesized by using carvone as a starting material and which is represented by the following formulae. 

Intermediates for synthesis of vitamin D derivatives

A process for producing an optically active halogen-containing alcohol having a high optical purity and represented by the following formula [I] ##STR1## wherein R.sup.1 is a halogen substituted alkyl group, R.sup.2 is a group selected from the group consisting of a substituted or unsubstituted alkyl group, alkene group, or alkyne group, and a substituted or unsubstituted phenyl group, and C having an asterisk indicates an asymmetric atom,

Process for producing optically active halogen-containing alcohols using

A novel antiferroelectric liquid crystal compound is disclosed which is represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently selected from C.sub.3 -C.sub.18 alkyl groups, respectively, Rf is a lower fluoroalkyl group, X is a group selected from the group consisting of --O--, --COO--, --OCO--, and --CO--, or a single bond, (A) and (B) each is a group independently selected from the group consisting of phenyl, biphenyl, and naphthalene group which may be substituted with a halogen atom, and C having an asterisk indicates an asynunetric carbon atom. A process for producing the antiferroelectric liquid crystal compound is also disclosed.

Antiferroelectric liquid crystal compound and process for producing the

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Kobe, Japan

Yoshihiro Takagi