Synthesis and cardiotonic activity of pyridylmethylene-2-indolinones

Article abstract of DOI:10.1016/0223-5234(92)90106-B

The title compounds were prepared by reaction of 3 2-indolinones with 3 different pyridinecarboxaldehydes. In one case (7b) it was possible to isolate and characterize both the E and Z isomers. In the other cases (except 5b) the E isomer was largely predominant or the only one present. The pharmacological activity of E-7b was not significantly different from that of Z-7b. Compound 6b, arising from the reaction of 5-methoxy-2-indolinone with 3-pyridinecarboxaldehyde, was significantly more active than the other compounds prepared.