Tetrahedron Letters p. 4447 - 4448 (1989)
Update date:2022-09-26
Topics:
Fishwick, Colin W. G.
Jones, Andrew D.
Mitchell, Michael B.
2,3-Dimethyl-3-(but-3-enyl)-indolium-N-methylide undergoes facile stereospecific intramolecular <3+2> cycloaddition to yield a novel tetracyclic indoline ring system.The analogous -(pent-4-enyl) and -(hex-5-enyl) systems fail to undergo cycloaddition but yield the corresponding N-methyl-2-methylene derivatives in moderate yield.
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