TCI B6433 1-Benzyl-5-chloroindoline-2,3-dione (CAS 26960-68-9) is an N-benzyl protected, chlorine-substituted isatin derivative supplied as a heterocyclic building block. The reactive C-3 carbonyl of the isatin core makes it a common starting point for oxindole and spirooxindole synthesis. The chloro substituent additionally allows researchers to probe electronic effects on reactivity and product properties. Supplied in milligram-scale packaging for exploratory synthesis, it should be stored tightly sealed in a cool, dry, dark place with reference to the manufacturer's safety data sheet.
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