Process for the preparation of new chromene derivatives

Details Process for the preparation of new chromene derivatives Process for the preparation of new chromene derivatives

C - Chemistry, Metallurgy

07

D

260/359, 260/266

C07D 311/58 (2006.01) C07D 405/06 (2006.01)

Patent

CA 1099717

ABSTRACT OF THE DISCLOSURE. The present invention relates to a process for the preparation of new compounds of the general formula : Image (I) in which : R1 is selected from hydrogen and alkoxy having 1-7 carbon atoms, R2 is hydrogen, n is selected from zero and 1, X and Y are hydrogen atoms, and Z is hydroxy, or Y and Z taken together represent an oxygen atom, or, when n = 1, X and Z may represent a single bond, A represents an amino radical, and a pharmaceutically acceptable acid addition salt thereof. These compounds are useful for the treatment of asthma. - 1 -

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