Sumitomo Chemical Company, Limited

Agency of Industrial Science and Technology

Sumitomo Electric Company, Limited

New Energy and Industrial Technology Development Organization

Naoto Konya

Shinzo Seko

Toshiya Takahashi

Gohfu Suzukamo

Yukio Yoneyoshi

Noriyuki Doi

Kazutaka Kimura

Masayoshi Minai

Koichi Fujisawa

Chizu Sekine

Yoji Sakito

Takaharu Ikeda

Shinji Nishii

Atsushi Furutani

Masashi Kamitamari

Hiroko Sakane

Takashi Miyawaki

Process for producing retinol and intermediate compounds for producing the same

Process for producing vitamin A aldehyde and intermediate for producing the same

Process for producing &bgr;-carotene

Process for producing lycopene and intermediate thereof

Process for producing retinal and intermediates for producing the same

There are disclosed sulfone aldehyde derivatives of the Formula (1):

Process for producing retinal and intermediate for producing the same

A tetraene derivative of the formula (1): ##STR1## wherein Ar represents an aryl group which may be optionally substituted with at least one substituent, and R.sup.1 and R.sup.2 are identical or different and represent a hydrogen atom, a lower alkyl group or a protective group of a hydroxyl group; synthesis methods therefor and synthesis methods using the same.

Tetraene derivative and process for producing the same

Provide is a novel phenylacetylene compound (1) which has a large anisotropy of refractive index, tends to be mixed with other liquid crystals, and is more advantageous in stability to light, a liquid crystal composition and a liquid crystal element usable for an optical shutter, a display element, ##STR1## A.sup.1 to A.sup.12 each independently represent a hydrogen atom, a fluorine atom, or an alkyl group having 1 to 10 carbon atoms, and at least one is an alkyl group.

Phenylacetylene compound and liquid crystal composition comprising the

A process for preparing an optically active alcohol by reacting a prochiral ketone corresponding to the optically active alcohol and an acid with a mixture of (1) a boron-containing compound selected from the group consisting of i) a borane compound which is obtained from an optically active .beta.-aminoalcohol and a boron hydride; or obtained from the optically active .beta.-aminoalcohol, a metal borohydride and an acid and ii) an optically active oxazaborolidine and (2) a metal borohydride; and a process for preparing an optically active amine by reacting an oxime derivative and an acid with a mixture of (1) a boron-containing compound selected from the group consisting of i) a borane compound which is obtained from an optically active .beta.-aminoalcohol and a boron hydride, or obtained from said optically active .beta.-aminoalcohol, a metal borohydride and an acid and ii) an optically active oxazaborolidine, and (2) a metal borohydride.

Processes for preparing optically active alcohols and optically active

Disclosed is a process for producing an optically active amine represented by the formula (IV) ##STR1## wherein R.sub.7 and R.sub.8 each denote an alkyl group, aryl group or aralkyl group, providing that they do not denote the same group at the same time, and * indicates an asymmetric carbon atom, which comprises reacting an asymmetric reducing agent obtained from (1) an optically active amine derivative represented by the formula (I) ##STR2## wherein R.sub.1 denotes an alkyl group, aryl group or aralkyl group; R.sub.2 denotes a hydrogen atom, alkyl group or aralkyl group; R.sub.3 denotes an aryl group or a substituent represented by the formula (II) ##STR3## wherein R.sub.4 and R.sub.5 each denote a hydrogen atom, aryl group or aralkyl group, and * is as defined above, (2) a metal borohydride and (3) sulfuric acid, with either the syn-isomer or the anti-isomer of an oxime derivative represented by the formula (III) or with a mixture rich in either one of the two isomers ##STR4## wherein R.sub.6 denotes an alkyl group, aralkyl group or alkyl-substituted silyl group, and R.sub.7 and R.sub.8 are as defined above. The optically active amine obtained can be used as a resolving agent for preparing medicinal agents, agricultural chemicals, or intermediates thereof.

Process for producing optically active amines

The process for producing an optically active alcohol of the present invention comprises allowing

Process for producing optically active alcohol

Growing community of inventors

Takatsuki, Japan

Naoto Konya