Method for preparing optically active...

Details Method for preparing optically active... Method for preparing optically active...

C - Chemistry, Metallurgy

07

D

C07D 405/12 (2006.01) A61K 31/395 (2006.01) C07D 405/14 (2006.01) C07D 409/14 (2006.01) C07D 493/04 (2006.01)

Patent

CA 2042124

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 antihyper- tensive, 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.

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