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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5064564 B1

PDFFull Text
Date of Patent:
Nov. 12, 1991

Filed:

Dec. 20, 1990

Optically active compound, intermediate therefor, process for producing

Applicant:
Inventors:

Sadao Takehara, Saitama, JP;

Takeshi Kuriyama, Saitama, JP;

Toru Fujisawa, Saitama, JP;

Kayoko Nakamura, Chiba, JP;

Tamejiro Hiyama, Kanagawa, JP;

Kusumoto, Tetsuo, Kanagawa, JP;

Akiko Nakayama, Tokyo, JP;

Assignees:

Dainippon Ink and Chemicals, Inc., Tokyo, JP;

Sagami Chemical Research Center, Tokyo, JP;

Attorney:

Armstrong, Nikaido, Marmelstein, Kubovcik & Murray

Primary Examiner:

John S Maples

Assistant Examiner:

Wu, Shean C

Int. Cl.
CPC ...
C09K / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25-2299.61 ; 25229901 ; 544298 ; 544335 ; 560 19 ; 560 38 ; 560 39 ; 560 42 ; 560102 ; 560103 ; 560104 ; 560106 ; 560107 ; 568669 ; 568704 ; 568705 ; 568715 ;
Abstract

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.

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Takehara, Sadao. (1991). Optically active compound, intermediate therefor, process for producing (U.S. Patent No. 5064564). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5064564

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