Isatin chloride: A phantom. Reactions of 2-(2, 2-dichloro-2, 3-dihydro-3-oxoindol-1-yl)-3H-indol-3-one

J Cornforth, PB Hitchcock, P Rozos

Index: Cornforth, John; Hitchcock, Peter B.; Rozos, Panteleimon Journal of the Chemical Society - Perkin Transactions 1, 1996 , # 23 p. 2787 - 2792

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Citation Number: 19

Abstract

It is shown that 2-chloro-3H-indol-3-one 1 and analogues have never actually been isolated and that their reactions, reported over 115 years in 40 papers and 4 patents, are those of more or less impure 2-(2, 2-dichloro-2, 3-dihydro-3-oxoindol-1-yl)-3H-indol-3-one 14. Several reactions of the parent compound and its 5, 5′-dimethyl and 5, 5′-dibromo derivatives are reported, especially a reaction with dry methanol leading to the known ...