The Stille Reaction in the Synthesis of the C<sub>37</sub>-Norcarotenoid Butenolide Pyrrhoxanthin. Scope and Limitations
作者:Belén Vaz、Marta Domínguez、Rosana Álvarez、Angel R. de Lera
DOI:10.1021/jo060490z
日期:2006.8.1
The sequential Stille cross-coupling reactions of the dihalogenated γ-alkylidenebutenolide 7 with stannanes 9 and 6 afforded the carbon skeleton of pyrrhoxanthin, a highly functionalized C7‘−C8‘ acetylenic C37-norcarotenoid butenolide. Although the first halogen-selective Stille coupling takes place in 90% yield at ambient temperature, double isomerization of the Z,E- to the E,Z-C7‘−C10‘ enyne, likely
The Stille Reaction in the Synthesis of Carotenoid Butenolides: Synthesis of 6‘-<i>e</i><i>pi</i>-Peridinin
作者:Belén Vaz、Rosana Alvarez、Reinhard Brückner、Angel R. de Lera
DOI:10.1021/ol0478281
日期:2005.2.1
A new strategy for carotenoid butenolides has been developed that is based in part in halogen-selective Stille cross-coupling of dihalogenated ylidenebutenolide segment 2 and highly functionalized alkenylstannanes.