2,2'-Vinylidenedipyridine and its diquaternary salts

Abstract

2,2?Vinylidenedipyridine, the first example of a vinylidenedipyridine, has been prepared from di-2-pyridyl ketone by way of a Wittig reaction. It forms diquaternary salts with dimethyl sulphate and ethylene dibromide.