SYNTHESIS OF 2-ACETYL-5,8-DIHYDRO-1,4-DIHYDROXY-3-METHYL NAPHTHALENE - A PRODUCT FROM THE ISOMERISATION OF DIELS-ALDER ADDUCTS OF BOTH 5-METHYL- AND 6-METHYL-2-ACETYL-1,4-BENZOQUINONE WITH 1,3-BUTADIENE

摘要

2-Acetyl-5,8-dihydro-1,4-dihydroxy-3-methyl-naphthalene was synthesised via Diels-Alder addition of 2-acetyl-3-methyl-1,4-benzoquinone to buta-13-diene followed by enolisation. It was identical with material obtained by pyridine-induced acetyl migration from the 1,3-butadiene adducts of both 3- and 6-methyl-2-acetyl-1,4-benzoquinone. [References: 5]