Tetrahedron p. 2541 - 2550 (1989)
Update date:2022-08-04
Topics:
Repke, David B.
Jahangir
Clark, Robin D.
Nelson, Janis T.
MacLean, David B.
The lithio derivatives of 3-cyano-4-methylpyridines and 6,7-dihydro-5H-2-pyridine-4-carbonitrile react with 2,9-bis-(trimethylsilyl)-3,4-dihydropyrido<3,4-b>indolium trifluoromethanesulfonate to form cyclic amidines which, upon hydrolysis and oxidation, produce the title alkaloids.
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(1987)
