Sugimura, Yukio published the artcileSeven-membered ring compounds. XXXVIII. Reaction of troponoid with ylide. III. Reaction of tropone with pyridinium compounds, Quality Control of 17281-59-3, the publication is Bulletin of the Chemical Society of Japan (1972), 45(10), 3174-8, database is CAplus.
Phenacylpyridinium ylide (I, R = H, Br) reacted with tropone to afford 2-hydroxy-2-phenyl-3-phenacyl-2H-cyclohepta[b]furan (II) which was converted into 2-(1,2-dibenzoylethyl)tropone. The reactions of tropone with several kinds of pyridinium bromides yielded 2-substituted tropones in the presence of amines and 1-azaazulene derivatives including III in a one-step formation in the presence of NH4OAc.
Bulletin of the Chemical Society of Japan published new progress about 17281-59-3. 17281-59-3 belongs to pyridine-derivatives, auxiliary class Pyridine,Nitrile,Salt, name is 1-(Cyanomethyl)pyridin-1-ium chloride, and the molecular formula is C3H3Br2ClO, Quality Control of 17281-59-3.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem