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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 5162553 B1

PDFFull Text
Date of Patent:
Nov. 10, 1992

Filed:

Jun. 19, 1991

Processes for preparing optically active

Applicant:
Inventors:

Shinro Setoguchi, Fukuoka, JP;

Mineo Tsuruda, Fukuoka, JP;

Chiaki Kitami, Mie, JP;

Tsutomu Yamanaka, Nakatsu, JP;

Assignee:

Yoshitomi Pharmaceutical Industries, Ltd., Osaka, JP;

Attorney:

Wenderoth, Lind & Ponack

Primary Examiner:

Nicky Chan

Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
549401 ; 549345 ; 549 66 ; 546269 ;
Abstract

The present invention provides an industrially valuable method for preparing an optically active 3,4-dihydro-3,4-epoxy-2H-1-benzopyran compound which is useful as a starting material for an optically active benzopyran compound with antihypertensive, coronary blood flow-increasing activities and the like, and also provides a diastereometric ester compound with a 3-halo-4-hydroxy-2H-1-benzopyran compound which is useful as an intermediate for said epoxy compound.

Find Patent Forward Citations

Setoguchi, Shinro. (1992). Processes for preparing optically active (U.S. Patent No. 5162553). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5162553

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