通过将羰基官能团转化为烯醇九氟甲磺酸酯中间体,然后消除以得到 CC 三键,从羰基化合物中以良好至极好的分离产率获得了末端和内部乙炔。磷腈碱与温和亲电子的九氟丁烷-1-磺酰氟相结合均匀地诱导了一锅法转化。该方法是迄今为止报道的方法中最通用的,因为它适用于无环酮和醛。只有适度的动力学区域选择性有利于从甲基正烷基酮实现的 alk-1-yne 代表了该方法的局限性。在所有其他情况下,都获得了单独的炔烃产品。
Enantioselective Total Synthesis of (−)-Curcuquinone via Regioselective Chromium-Mediated Benzannulation
作者:Ana Minatti、Karl Heinz Dötz
DOI:10.1021/jo0500939
日期:2005.4.1
A short and efficient, high-yielding enantioselective total synthesis of the marine natural product (−)-curcuquinone 1 is reported involving a regioselective [3 + 2 + 1]-benzannulation reaction as the key step. Additionally, this strategy allows the isolation of curcuhydroquinone monomethyl ether 9 as an intermediate of the benzannulation reaction and its subsequent further protection toward diversified
On the intramolecular pyrone Diels–Alder approach to basiliolide B
作者:Mariya V. Kozytska、Gregory B. Dudley
DOI:10.1016/j.tetlet.2008.03.031
日期:2008.4
A unified synthetic approach to the basiliolides/transtaganolides is outlined herein, along with studies illustrating the feasibility of the strategy with respect to the totalsynthesis of basiliolide B. This work lays the foundation for chemical synthesis of an emerging family of Thapsia metabolites.
in good to excellent isolated yields from carbonyl compounds by converting the carbonyl functionality into the enol nonaflate intermediate followed by elimination to give the C-C triple bond. The one-pot transformations were uniformly induced by phosphazene bases combined with mildly electrophilic nonafluorobutane-1-sulfonyl fluoride. The method is the most general among those reported to date as it
通过将羰基官能团转化为烯醇九氟甲磺酸酯中间体,然后消除以得到 CC 三键,从羰基化合物中以良好至极好的分离产率获得了末端和内部乙炔。磷腈碱与温和亲电子的九氟丁烷-1-磺酰氟相结合均匀地诱导了一锅法转化。该方法是迄今为止报道的方法中最通用的,因为它适用于无环酮和醛。只有适度的动力学区域选择性有利于从甲基正烷基酮实现的 alk-1-yne 代表了该方法的局限性。在所有其他情况下,都获得了单独的炔烃产品。