The photoinduced intramolecular meta-cycloaddition of bichromophores 1a-1d gave diastereoselectively two types of adducts, 2a-2d and 3a-3d. respectively. The observed stereochemistry of cycloaddition was rationalized ...The photoinduced intramolecular meta-cycloaddition of bichromophores 1a-1d gave diastereoselectively two types of adducts, 2a-2d and 3a-3d. respectively. The observed stereochemistry of cycloaddition was rationalized in terms of hydrogen bond effect induced by the 3-hydroxy group in the 5-phenylpent-1-ene skeleton.展开更多
Acid catalyzed rearrangements of 1 and 3 were examined. The olefinic double bond was the most reactive group in protonation reaction. In the absence of olefinic double bond, tert-hydroxy group reacted faster than cycl...Acid catalyzed rearrangements of 1 and 3 were examined. The olefinic double bond was the most reactive group in protonation reaction. In the absence of olefinic double bond, tert-hydroxy group reacted faster than cyclopropane ring.展开更多
文摘The photoinduced intramolecular meta-cycloaddition of bichromophores 1a-1d gave diastereoselectively two types of adducts, 2a-2d and 3a-3d. respectively. The observed stereochemistry of cycloaddition was rationalized in terms of hydrogen bond effect induced by the 3-hydroxy group in the 5-phenylpent-1-ene skeleton.
文摘Acid catalyzed rearrangements of 1 and 3 were examined. The olefinic double bond was the most reactive group in protonation reaction. In the absence of olefinic double bond, tert-hydroxy group reacted faster than cyclopropane ring.
