... and aldehydes [7]. Isatins (1H-indole-2,3-diones) are synthetically versatile substrates, which can be used for the synthesis of a large variety of heterocyclic compounds, such as ... J. Chem. ... 395; (d) Brennan, MR; Erickson, KL; Szmalo, FS; Tansey, MJ; Thornton, JM Heterocycles. ...