Flash photolysis caged compounds

A bond-cleavage reaction that has been light-induced. The term has also been used to describe irradiation of a sample by light however, such usage is discouraged. See Flash Photolysis Photoreactive Caged Compounds... 

Kaplan, J.H. and Somlyo, A.P. (1989) Flash photolysis of caged compounds new tools for cellular physiology, TINS, 12, 54,-59. 

Yonemitsu et al. found that irradiation of the N-chloroacetyl derivative of dimethyltyramine 99 gave the dimeric cage compound 102 (Scheme 18). The presence of cyclohexa-2,4-dienone 100 as a transient species and its thermal dimerisation to the dimer 101 were proven by flash photolysis and also by trapping the intermediate with N-ethylmaleimide by a Diels-Alder addition. On treatment with trifluoroacetic acid, the cage compound 102 easily reverted to 101. ... 

Iwakuma, X, Hirao, K., and Yonemitsu, O., Photocyclization of N-chloroacetyltyramines. II. Flash photolysis and substituent effect studies on the formation of dimeric cage compounds and novel acid-catalyzed reversion,/. Am. Chem. Soc., 96, 2570,1974. 

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