Methoxycarbonyl shifts in Diels–Alder adducts of methoxycarbonyl-1,4-benzoquinones
作者:Mabel U. Akpuaka、Roy L. Beddoes、J. Malcolm Bruce、Steven Fitzjohn、Owen S. Mills
DOI:10.1039/c39820000686
日期:——
Treatment of 4a,5,8,8a-tetrahydro-4a-methoxycarbonyl-1,4-naphthaquinone with acetic anhydride gives the Δ8a,1 enol acetate, which in the presence of sodium acetate yields 1,4-diacetoxy-5,8-dihydro-6-methoxy-carbonylnaphthalene; the 2- and the 5-methyl, and the 2,5-dimethyl homologues behave analogously.
用乙酸酐处理4a,5,8,8a-四氢-4a-甲氧基羰基-1,4-萘醌得到Δ8a ,1烯醇乙酸酯,在乙酸钠存在下产生1,4-二乙酰氧基-5,8 -二氢-6-甲氧基-羰基萘;2-和5-甲基以及2,5-二甲基同系物的行为相似。