Synthesis of ellipticine and olivacine by the thermal electrocyclic reaction<i>via</i>pyridine 3,4-quinodimethane intermediates
作者:S. Hibino、E. Sugino
DOI:10.1002/jhet.5570270645
日期:1990.9
A synthesis of the antitumor alkaloids ellipticine 1 and olivacine 2 is reported. The route involves a thermal electrocyclic reaction of conjugated hexatriene system 4 derived from 2-alkenylindole derivatives 5. Heating of the 2-alkenylindole derivative 5b at 450–460° gave ellipticine 1 (30%) and 11-demethylellipticine 14 (43%). In a similar manner, the thermolysis of the 2-alkenylindole 5c afforded
报道了抗肿瘤生物碱玫瑰树碱1和olivacine 2的合成。该路线涉及衍生自2-烯基吲哚衍生物5的共轭己三烯系统4的热电环反应。将2-烯基吲哚衍生物5b在450–460°加热,得到玫瑰树碱1(30%)和11-去甲基玫瑰树碱14(43%)。以类似的方式,对2-烯基吲哚5c进行热解,得到了olivacine 2(57%)。