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Oxonium ions in organic synthesis: condensation of 2,3-dihydrofuran and 3,4-dihydro-2H-pyran with 1,3-dicarbonyl compounds

✍ Scribed by Bihovsky, Ron; Kumar, Mudubagilu Udaya; Ding, Shuji; Goyal, Arun


Book ID
126781547
Publisher
American Chemical Society
Year
1989
Tongue
English
Weight
423 KB
Volume
54
Category
Article
ISSN
0022-3263

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## Abstract Starting from 4‐hydroxycoumarins 4 and 1‐aryl‐2‐(dimethylaminomethyl)prop‐2‐en‐1‐ones 2 the title compounds 6 have been synthesized. The reaction is initiated by addition of the C‐3 carbon atom of 4‐hydroxycoumarin to the enone double bond of the Mannich base, subsequent deamination aff