Abstract Comparative Claisen rearrangements of 4-hydroxy - (7) and 4-acetoxy-1-allyloxy-5,8-ethano-5,8-dihydro-5-methoxynaphthalene (1) leading after chemoselective methylation to 4-acetoxy-2-allyl-1,5-dimethoxy-naphthalene (9) were investigated. Lewis acid mediated Fries rearrangements of 4-acetoxy-2-allyl-alkoxy-5-ethoxynaphthalenes lead to the formation of a naphtho[1,2 - b]furan in one case only
摘要
4-羟基 - (7) 和 4-乙酰氧基-1-烯丙氧基-5,8-
乙醇-5,8-二氢-5-甲氧基
萘 (1) 的 Claisen 重排比较,在
化学选择性甲基化后导致 4-乙酰氧基-2-烯丙基-
1,5-二甲氧基萘 (9) 进行了研究。
路易斯酸介导的 4-乙酰氧基-2-烯丙基-烷氧基-5-乙氧基
萘的 Fries 重排导致仅在一种情况下形成
萘并 [1,2 - b]
呋喃。