A series of axial and equatorial diastereomers of (coumarin-4-yl) methyl-caged adenosine cyclic 3', 5'-monophosphates (cAMPs), 1-6, having methoxy, dialkylamino, or no substituent in the 6-and/or 7-positions, and their corresponding 4-(hydroxymethyl) coumarin photoproducts 7-12 have been synthesized. The photochemical and UV/vis spectroscopical properties (absorption and fluorescence) of 1-6 and 7-12 have been examined in ...