Wolfgang Kirmse and Thomas Meinert
J. Chem. Soc., Chem. Commun., 1994, 1065-1066
DOI:
10.1039/C39940001065,
Paper
Bicyclo[2.2.1]hept-2-en-7-ylidene 10 and bicyclo[2.2.1]hept-5-en-2-ylidene 21 are shown to react with methanol by way of proton transfer, with formation of norborneyl cations.