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Electrocyclic reactions. II. Competition of steric and electronic effects and the stereochemistry of nonpolar 2 + 2 cycloadditions

โœ Scribed by Epiotis, Nicolaos D.


Book ID
127337823
Publisher
American Chemical Society
Year
1972
Tongue
English
Weight
786 KB
Volume
94
Category
Article
ISSN
0002-7863

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heptafulvene, 8, undergoes both an intramolecular [8+21 cycloaddition and a loll-electron electrocyclization followed by 1,5-sigmatropic hydrogen shifts to give 10 and 12, respectively. Acetylheptafulvene, 1, was reported to be unstable by Hafner,' although the reaction of 1 with DMAD to give an in