S. Cossu et al., NAPHTHO[2,1-F1',2'-H][1,5]DITHIONIN-S,S'-TETROXIDE - PREPARATION, STRUCTURE ELUCIDATION AND FACILE INTRAMOLECULAR [2-PHOTOCYCLIZATION(2]), Tetrahedron, 49(20), 1993, pp. 4333-4338
The preparation of compound 1, a conformational study in solution and
the unexpectedly facile rearrangement into 2 via photochemical intramo
lecular [2+2]-cycloaddition is described: the structure of these compo
unds have been investigated by NMR and X-ray diffraction.