Generation, Characterization and Some Reactions of 1, 1-Ethylene-1H-azulenium Ion
The title carbocation, generated from 1,1-ethylene-1,6-dihydroazulene and trityl tetrafluoroborate in deuterated acetonitrile at −20 °C, was characterized by means of low temperature NMR spectroscopy, and was found to undergo expansion of the cyclopropane ring at elevated temperature and to react with nucleophiles to give the addition products at the cyclopropane methylene carbon.
- Chemistry letters
Chemistry letters 1997(10), 1011-1012, 1997-10
The Chemical Society of Japan