SCHEDULED MAINTENANCE
The prenylchromone peucenin (9a) was converted into the terminal olefin (11) and the terminal epoxide (13); acid- and base-catalysed cyclisation of the latter furnished a pyranochromone (14a), and the pyranoquinoline (21) was prepared similarly. The furochromone (±)-visamminol (8) was synthesised from peucenin.
M. F. Grundon and H. M. Okely, J. Chem. Soc., Perkin Trans. 1, 1975, 150 DOI: 10.1039/P19750000150
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