Process for making an optically active 3,4-dihydro-3,4-epoxy-2H-

Details Process for making an optically active 3,4-dihydro-3,4-epoxy-2H- Process for making an optically active 3,4-dihydro-3,4-epoxy-2H-

1992-10-19

1993-12-28

Shah, Mukund J.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Having -c-, wherein x is chalcogen, bonded directly to...

546 15, 549331, 549345, 549387, C07D49304, A61K 31335

Patent

active

052739988

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, provides a diastereomeric ester compound which is useful as an intermediate for said epoxy compound and also provides a use of said diastereomeric ester compound in making of said epoxy compound, and further an optically active benzopyran compound which is useful as medicine.

REFERENCES:
patent: 4446113 (1984-05-01), Evans et al.
patent: 4639534 (1987-01-01), Curzons
patent: 4783483 (1988-11-01), Ferro et al.
patent: 4786742 (1988-11-01), Curzons
patent: 5091533 (1992-02-01), Belanger et al.
patent: 5191093 (1993-03-01), Baker et al.

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