Journal of Heterocyclic Chemistry p. 1413 - 1415 (1998)
Update date:2022-08-03
Topics:
Wang, Dao-Lin
Imafuku, Kimiaki
3-Acetyltropolone (1) reacted with benzaldehydes in trimethyl orthoformate in the presence of perchloric acid to afford 2-aryl-4-methoxy- 9-oxocyclohepta[b]pyrylium perchlorates 3a-c in 25-37% yields. From the filtrates, 3-(3,4-diaryl-3-butenoyl)tropolones 4a,b and 3-(2- methoxycinnamoyl)tropolone (5) were also isolated.
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