Hofmann elimination in the reaction of 1-methylcycloalkyl chlorides with bulky alkoxides. A convenient procedure for the conversion of 1-methylcycloalkenes into methylenecycloalkanes via hydrochlorination–elimination. Synthesis of β-cedrene

Deprotonation of ternary iminium salts

“…sultant salts were relatively stable and in one case (7a) could be purified sufficiently for analysis. The other salts, particularly the aldiminium salts (8), were less stable and hygroscopic.…”