Pyridinium ylides derived from pyryliums and amines and a novel rearrangement of 1-vinyl-1, 2-dihydropyridines

…, RC Patel, A Tarraga-Tomas

文献索引：Katritzky, Alan R.; Chermprapai, Amornsri; Patel, Ranjan C.; Tarraga-Tomas, Alberto Journal of Organic Chemistry, 1982 , vol. 47, # 3 p. 492 - 497

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被引用次数: 29

摘要

l-Benzyl-2, 4-diphenylpyridiniums with benzaldehydes give oxazolopyridines which are dehydrated to 1-styryl derivatives. On pyrolysis the l-styryl-1, 2-dikydropyridine 21a gave 2, 4, 6-triphenylpyridine and m-chlorostyrene by a ring-enlargement-ring-contraction mechanism: this is a general reaction of l-vinyl-1, 2-dihydropyridines.