Tetrahedron Letters p. 8799 - 8802 (1997)
Update date:2022-08-03
Topics:
Yu, Peng
Cook, James M.
A convenient method has been developed to convert N(a)-H tetracyclicketone la into the two corresponding oxindolesr[(7)] diastereospecifically. Treatment of the N(a)-H, N(b)-benzyl tetracyclicketone 1a with t-BuOCl provided diastereomer 2a (related to Voacanga oxindoles), whereas the same process with Nb-H (1b) or N(b)-benzoyl (1c) substituted analogs funished the diastereomers 2b and 2c (related to alstonisine), respectively.
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