Nicholas Reactions in the Construction of Cyclohepta[<i>de</i>]naphthalenes and Cyclohepta[<i>de</i>]naphthalenones. The Total Synthesis of Microstegiol
作者:Rafiq A. Taj、James R. Green
DOI:10.1021/jo102127q
日期:2010.12.3
construction of cyclohepta[de]naphthalenes by way of ring closing metathesis and intramolecular Friedel−Crafts reactions, respectively, is described. Deprotection of the C-7 oxygen function to the corresponding naphthol allows tautomerization to cyclohepta[de]naphthalene-1-ones upon seven-membered-ring closure in most cases, and replacement of the C-2 oxygen function in the naphthalene by a methyl group ultimately
2,7-二氧化萘的尼古拉斯反应化学在环庚的合成[应用德]萘并在合成(±)-microstegiol(1)的设计。据报道,尼古拉斯单取代(主要为C-1)的取代特征和2,7-二加氧萘的解离反应(主要为1,6-)。1,8- dicondensation产物和应用选择的C-1 monocondensation产品环庚的构造[ DE ]通过闭环复分解的和分子内Friedel-Crafts反应方式萘,分别进行说明。在C-7氧功能为相应的萘酚的脱保护可以互变异构化至环庚[日在大多数情况下,在七元环闭合时]]萘-1-酮以及用甲基取代萘中的C-2氧官能团最终可以合成(±)-微甜菊醇。