Total Synthesis of (±)-Hedychenone: Trimethyldecalin Terpene Systems via Stepwise Allenoate Diene Cycloaddition
作者:Michael E. Jung、Masayuki Murakami
DOI:10.1021/ol062456c
日期:2006.12.1
The total synthesis of hedychenone 1 is described. The cycloaddition of the hindered diene 2 and the allenecarboxylate 3 has been shown conclusively to proceed via the [2+2] cycloadduct 5 to give a 2:1 mixture of the desired formal Diels-Alder adducts, the exo and endo isomers 4xn and is thus a stepwise [4+2] cycloaddition. The exo isomer 4x was converted in four steps (reduction, oxidation, olefination
描述了十七烯酮1的全合成。已证明受阻二烯2和烯丙基羧酸酯3的环加成通过[2 + 2]环加合物5最终进行,得到所需的正式Diels-Alder加合物,外向异构体和内向异构体4xn的2:1混合物,且因此逐步[4 + 2]环加成。exo异构体4x通过四个步骤(还原,氧化,烯化和去甲硅烷基化)转化为海藻酮1。