Tricyclic indole derivative 11 affords the imide 12 under Stobbe reaction conditions rather than the expected intermediate containing an ergoline ring.
References
1.
Part 4, see: MoldvaiI., Temesvári-MajorE., Gács-BaitzE., EgyedO. and SzántayCs., Hetrocycles, in press.
2.
TeranishiK., HayashiS., NakatsukaS. and GotoT., Tetrahedron Lett., 1994, 35, 8173.
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BowmanR. E., EvansD. D., GuyettJ., NagyH., WealeJ., WeyellD. J. and WhiteA. C., J. Chem. Soc., Perkin Trans. 1, 1972, 1926;
4.
BowmanR. E., EvansD. D., GuyettJ., WealeJ. and WhiteA. C., J. Chem. Soc., Perkin Trans. I, 1973, 760.
5.
Compound 10 was prepared from diethyl formylsuccinate (WermuthC. G., J. Org. Chem., 1979, 44, 2406) by Jones oxidation and subsequent treatment of the obtained acid with thionyl chloride.
6.
JohnsonW. S. and DaubG. H., Org. React., 1951, 6, 1.
