Abstract
Condensation of isatin-α-anil with acetylacetone and with derivatives of malonic and acetoacetic acids in acetic anhydride has given 5 indogenides. It is observed that isatin-α-anil is readily acetylated by acetic anhydride. The acetyl derivative is very reactive, and is an intermediate in the condensation of isatin-α-anil with acetylacetone in acetic anhydride. The indogenides which have been synthesized are nonphototropic as a result of the presence of intramolecular hydrogen bonds.
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