Naturally occurring compounds related to phenalenone. Part IV. Some transformations and molecular rearrangements of compounds in the herqueinone series
Abstract
Dihydroherqueinone di- and tri-methyl ethers (2b and c) have been oxidised to the 6a-hydroxy-1,6-diketone (4); the epimeric 5,6-glycols (3b) have been shown to undergo rearrangement to bridged ketones (1,5-methanonaphth-[1,8-cd]oxocin-12-ones)(7) when treated with boron trifluoride–ether.