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The photoinduced intramolecular meta-cycloaddition of bichromophores la-ld gavediastereoselectively two types of adducts, 2a-2d and 3a-3d. respectively. The observed stereo-chemstry of cycloaddition was rationalized in terms of hydrogen bond effect induced by the 3-hydroxy group in the 5-Phenylpent- 1 -ene skeleton.
The photoinduced intramolecular meta-cycloaddition of bichromophores la-ld gave diastereoselectively two types of adducts, 2a-2d and 3a-3d. Respectively. The observed stereo-chemstry of cycloaddition was rationalized in terms of hydrogen bond effect induced by the 3-hydroxy group in the 5-Phenylpent- 1 -ene skeleton.