Tetrahedron Letters p. 4099 - 4102 (1991)
Update date:2022-08-03
Topics:
Hart, David J.
Wu, Shung C.
Free radical cyclization of vinylogous urethanes 5 and 12 gave spiro oxindoles 6 and 13 + 14, in 95percent and 84percent yields, respectively.Cyclization of projected gelsemine intermediate 19 resulted in the formation of oxindole 22 via a cyclization, 1,4-hydrogen atom transfer, reduction sequence.
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