作者:Noelia Fontán、Marta Domínguez、Rosana Álvarez、Ángel R. de Lera
DOI:10.1002/ejoc.201100935
日期:2011.11
In an effort to push olefin metathesis to the limits of conjugation in reactants and products, the C40-symmetrical carotenoids β,β-carotene (1), lycopene (2), (3R,3′R)-zeaxanthin (3), and rac-isozeaxanthin (4), which are conjugated undecaenes, have been synthesized from C21-terminal hexaenes by treatment with Grubbs' second-generation Ru catalyst in dichloromethane at 50 °C.
为了将烯烃复分解反应推到反应物和产物共轭的极限,C40 对称类胡萝卜素 β,β-胡萝卜素 (1)、番茄红素 (2)、(3R,3'R)-玉米黄质 (3) 和外消旋异玉米黄质 (4) 是共轭十一碳烯,通过在 50 °C 的二氯甲烷中用 Grubbs 的第二代 Ru 催化剂处理,由 C21 端六烯合成。