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Some reactions of 4 H ‐pyrylium salts with tributylphosphine and with tertiary amines
Author(s) -
Reynolds G. A.,
Chen C. H.
Publication year - 1981
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570180632
Subject(s) - chemistry , tributylphosphine , acetonitrile , perchlorate , yield (engineering) , medicinal chemistry , salt (chemistry) , phosphonium , organic chemistry , ion , catalysis , materials science , metallurgy
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)‐Δ 4.4′ ‐bi‐4 H ‐pyran in quantitative yield. The reaction of 3 and other 4 H ‐pyrylium salts with tertiary amines gave 4 H ‐pyrans.