G. Reynolds, Chin H. Chen
Oct 1, 1981
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0
Influential Citations
11
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
The phosphonium salt from tributylphosphine and 2,6-di(4-methoxyphenyl)pyrylium perchlorate (3) reacted with diisopropylethylamine in acetonitrile to give 2,2′,6,6′-tetra(4-methoxyphenyl)-Δ4.4′-bi-4H-pyran in quantitative yield. The reaction of 3 and other 4H-pyrylium salts with tertiary amines gave 4H-pyrans.