A compound of the formula (I)
##STR1##
in which R1 is -OR11, -SR11, -SOR11,
-SO2R11, -NHR11, or -NR12R13 ,
and R11, R12, and R13 are as defined broadly in
the text. R2 is H, C1-C6alkyl, carbamoyl, or an
ester group. R3 is thienyl, pyridyl optionally substituted by halogen
or C1-C6alkoxy; naphthyl optionally substituted by C1-C6alkoxy;
dioxane fused phenyl; dioxacyclopentane fused phenyl; or optionally substituted
phenyl. Y is CH or N. A process for preparing such compounds, pharmaceutical compositions
containing such compounds, and a method of treating asthma using them are also
disclosed and claimed.
