Heterocyclic Communications p. 31 - 34 (2003)
Update date:2022-08-15
Topics:
De Souza, Soraia P.L.
Da Silva, Joaquim Fernando M.
De Mattos, Marcio C.S.
N-halosaccharins (5 mmol) react smoothly at room temperature with isatin (5 mmol) in the presence of SiO2 (5 g) to produce specifically the 5-halo derivative. Using this procedure, 5-chloroisatin was obtained in 48% purified yield (72 h), 5-bromoisatin in 58% (12 h) and 5-iodoisatin in 80% (8 h).
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