Base catalysed rearrangements of 4-hydroxyphenyl allyl ethers: syntheses of alliodorin and alliodorol
作者:Laurence M. Harwood、Anona J. Oxford、Colin Thomson
DOI:10.1039/c39910001303
日期:——
4-hydroxyphenyl allyl ethers 1a–e in refluxing aqueous methanol in the presence of KOH and oxygen furnish 2-substituted 1,4-dihydroxybenzene derivatives; products 2a,b and 3c are derived via basecatalysed Claisen rearrangement, whereas presence of 3′-substitution on the allylic moiety disfavours this pathway, leading to formation of products 4b–c, consistent with the operation of basecatalysed tandem [2,3]-