作者:Edwin M. Mmutlane、Joseph P. Michael、Ivan R. Green、Charles B. de Koning
DOI:10.1039/b407208a
日期:——
Readily available ethyl-4-acetoxy-6,8-dimethoxynaphthalene-2-carboxylate 27 was converted into 1-[3-allyl-4-(benzyloxy)-6,8-dimethoxy-2-naphthyl)-1-ethanol 31 in seven steps. Subjection of this compound to Wacker oxidation conditions provided 5-benzyloxy-7,9-dimethoxy-1,3-dimethyl-1H-benzo[g]isochromene 32 in good yield. Hydrogenation of the isochromene afforded (±)-cis-7,9-dimethoxy-1,3-dimethyl-1H-benzo[g]isochroman-5-ol 33 as the major product, which was readily converted into ventiloquinone L.
现成的乙基-4-乙酸氧基-6,8-二甲氧基萘-2-羧酸酯27经过七步反应转化为1-[3-丙烯基-4-(苄氧基)-6,8-二甲氧基-2-萘基]-1-醇31。将该化合物置于瓦克氧化条件下,得到了5-苄氧基-7,9-二甲氧基-1,3-二甲基-1H-苯并[g]异喃烯32,产率良好。对这种异喃烯进行氢化反应,主要生成(±)-顺-7,9-二甲氧基-1,3-二甲基-1H-苯并[g]异喃-5-醇33,随后可以方便地转化为通风醌L。