Since the pioneering work by Barton et al. on the photochemistry of cyclohexadienones of the ortho-type, 1, it has been known that the phenolic nucleus are readily cleaved to produce cis-ketene, 2, under UV light. 1 We have been interested in the synthesis and utilities of symmetrical bis-cyclohexadienones such as 3, in which two units of the photo active molecules are linked through varying lengths of carbon tether. These type of compounds, in principle, can be ...
[Kotch, Frank W.; Sidorov, Vladimir; Lam, Yiu-Fai; Kayser, Katherine J.; Li, Hojun; Kaucher, Mark S.; Davis, Jeffery T. Journal of the American Chemical Society, 2003 , vol. 125, # 49 p. 15140 - 15150]
