Solid state photoreactions of acetylcoumarins and indole in microenvironment

The solid state photoreactions of mixed crystals of acetylcoumarins and indole were investigated, and the mixed crystals were characterized by solid UV spectra, solid FL spectra and X-ray powder diffraction analysis. The photoreactions of 3-acetylcoumarin and its 7-acetyloxy, 7-benzoyloxy, 6-bromo and 5,6-benzo derivatives with indole in the solid state afforded condensation products 1-5, respectivelly, while 3-acetyl-6-nitrocoummarin with indole gave ring cleavage decarbonyl addition product 6. The products were identified by IR, ¹H NMR, MS and elemental analyses.