3H-Indol-3-ones

Indigo (or 2-( 1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-3H-indol-3-one) (Fig. 5.7.1) is an example of a water-insoluble dye, contributing to its resistance... 

Fig.24 Chemical structures of 2-alkyl and 2-aryl substituted-3H-indol-3-one-l-oxides [153]...

The putative 2-chloro-3H-indol-3-one was also reacted with phenols510 and N,N-dimethylaniline511 to give dyestuffs (Scheme 129). 

On the other hand, the reaction of this chloride with anilines always led to isatin-3-imines. In an attempt to rationalize these contradictory results, it was proposed that 2-chloro-3H-indol-3-one was the substrate but that this compound, which reacts with nucleophiles at the C-2 position, readily hydrolyzed in solvents containing water, thus yielding isatin and products resulting from attack at C-3. Sir John Comforth revisited the chemistry of this... 

K.66) 3//-Indol-3-one, 1,2-dihydro-, 1,2-dihydro-3H-indol-3-one, 3-oxoindole (this name is incorrect, it could correspond to 3//-indol-3-one, C H NO, but in the review of Vitzthum (1976) 3-oxoindole is given with C HqNO) [67285-12-5]... 

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