Naphthalene derivatives, processes for the preparation...

Details Naphthalene derivatives, processes for the preparation... Naphthalene derivatives, processes for the preparation...

C - Chemistry, Metallurgy

07

D

C07D 401/04 (2006.01) C07D 213/61 (2006.01) C07D 213/72 (2006.01) C07D 213/75 (2006.01) C07D 401/14 (2006.01) C07D 413/14 (2006.01) C07D 417/04 (2006.01) C07D 471/04 (2006.01) C07D 491/056 (2006.01) C07D 498/04 (2006.01) C07D 513/04 (2006.01) C07D 521/00 (2006.01) C07F 7/10 (2006.01)

Patent

CA 2178974

The present invention is directed to naphthalene derivatives of the formula [I]: (see formula I) wherein R1 and R2 are the same or different and each represent H, protected or unprotected OH, one of R3 and R4 is protected or unprotected hydroxymethyl, and the other is H, lower alkyl, or protected or unprotected hydroxymethyl, R5 and R6 are the same or different and each represent H, substituted or unsubstituted lower alkyl, substituted or unsubstituted phenyl or protected or unprotected NH2, or both combine together with the adjacent N to form substituted or unsubstituted heterocyclic group, and pharmaceutically acceptable salts thereof. These compounds showing excellent bronchoconstriction inhibitory activity, and hence, are useful in the prophylaxis or treatment of asthma.

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