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
CULTURE temperature is an important factor in anther culture. In our laboratory we have made intensive studies on this problem, and found that the responses of anther culture to culture temperature were not only sensi...CULTURE temperature is an important factor in anther culture. In our laboratory we have made intensive studies on this problem, and found that the responses of anther culture to culture temperature were not only sensitive but also complicated, and varied with genotypes and展开更多
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
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.
文摘CULTURE temperature is an important factor in anther culture. In our laboratory we have made intensive studies on this problem, and found that the responses of anther culture to culture temperature were not only sensitive but also complicated, and varied with genotypes and
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.
