HIBINO, S.;SUGINO, E., J. HETEROCYCL. CHEM., 27,(1990) N, C. 1751-1755
作者:HIBINO, S.、SUGINO, E.
DOI:——
日期:——
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