Intramolecular processes in four photochemically bifunctional compounds whose mole cules combine a spironaphthoxazine moiety and a substituted azomethine fragment (both capa ble of undergoing reversible photochemical processes) were studied by femtosecond laser ab sorption spectroscopy. It was established that in the irradiation at 350 nm these processes including ring opening and intramolecular proton transfer proceed independently in both frag ments of the molecules under study. A common mechanism of the photophysical and photo chemical processes in the compounds under study was revealed and quantitative characteristics of the elementary stages were measured. The possibility of controlling the photoproduct yield ratio by phase modulation of excitation femtosecond pulse was demonstrated. The photo product yield ratio is affected by two factors, the intensity and phase characteristics of the excitation pulse.