Studies Directed Toward the Synthesis of Taxanes: Construction of the Tricyclo[5.3.1.01,7]undecane System
作者:Alex Nivlet、Luc Dechoux、Thierry Le Gall、Charles Mioskowski
DOI:10.1002/(sici)1099-0690(199912)1999:12<3251::aid-ejoc3251>3.0.co;2-7
日期:1999.12
The intramolecular nucleophilic substitution of an epoxide by the anion of a nitrile was used to construct the bicyclo[3.1.0]hexane system of 9, derived from 8, and of 14, derived from 13. The intramolecular 1,3-dipolar cycloaddition of nitrile oxide 4, obtained from 14, led to isoxazoline 3. However, it was not possible to convert 3 into the corresponding β-hydroxy ketone. Rearrangements of 3 were
环氧化物被腈的阴离子的分子内亲核取代用于构建衍生自 8 的 9 和衍生自 13 的 14 的双环 [3.1.0] 己烷系统。 分子内 1,3-偶极环加成反应从 14 获得的氧化腈 4 导致异恶唑啉 3。但是,不可能将 3 转化为相应的 β-羟基酮。在脱水试剂的存在下观察到 3 的重排,导致化合物 19-21,其在结构上与 11(151)abeotaxanes 相关。