HOMOCONJUGATED KETONES WITH EXTENDED UNSATURATION - WAVELENGTH-SELECTIVE, REGIOSELECTIVE, DIASTEREOSELECTIVE, AND ENANTIOSPECIFIC PHOTOCHEMICAL-TRANSFORMATIONS OF METHYL 7-OXOSPIRO[5.5]UNDECA-1,3 AND 2,4-DIENE-2-CARBOXYLATE
J. Oren et al., HOMOCONJUGATED KETONES WITH EXTENDED UNSATURATION - WAVELENGTH-SELECTIVE, REGIOSELECTIVE, DIASTEREOSELECTIVE, AND ENANTIOSPECIFIC PHOTOCHEMICAL-TRANSFORMATIONS OF METHYL 7-OXOSPIRO[5.5]UNDECA-1,3 AND 2,4-DIENE-2-CARBOXYLATE, Helvetica Chimica Acta, 76(3), 1993, pp. 1182-1193
The title molecules were shown to photorearrange with remarkable selec
tivity. Wavelength variation steers the rearrangement modes, of which
the [1,2]-acyl shift was found to be largely regioselective, diastereo
selective, and enantiospecific. Chemical intercorrelation of products
and mechanistic studies were carried out all along. The potential sign
ificance of these photochemical processes in selective synthetic schem
es is discussed.