80561-33-7Relevant articles and documents
Pyridinium Ylides Derived from Pyryliums and Amines and a Novel Rearrangement of 1-Vinyl-1,2-dihydropyridines
Katritzky, Alan R.,Chermprapai, Amornsri,Patel, Ranjan C.,Tarraga-Tomas, Alberto
, p. 492 - 497 (2007/10/02)
1-Benzyl-2,4-diphenylpyridiniums with benzaldehydes give oxazolopyridines which are dehydrated to 1-styryl derivatives.On pyrolysis the 1-styryl-1,2-dihydropyridine 21a gave 2,4,6-triphenylpyridine and m-chlorostyrene by a ring-enlargement-ring-contraction mechanism: this is a general reaction of 1-vinyl-1,2-dihydropyridines.