LACTAM AND ACID AMIDE ACETALS. 64. ACYLATION OF ENAMINO KETONES OF THE INDOLIN-3-ONE AND 2-PYRROLIN-4-ONE SERIES AND SYNTHESIS OF 2-INDOLYL- AND 5-PYRROLYLACRYLIC ACID DERIVATIVES

Article abstract of DOI:10.1007/BF00474229

The reaction of 2-(N,N-dimethylaminomethylene)indolin-3-one and 2-methyl-3-ethoxycarbonyl-5-(N,N-dimethyl aminomethylene)-2-pyrrolin-4-one with acyl halides was used to synthesize immonium salts, the aqueous hydrolysis of which leads to 2-formyl-3-hydroxy