Np. Argade et V. Balasubramaniyan, Ring closure reactions of suitably ortho-substituted maleanilic acids: An avenue for heterocycles, HETEROCYCLE, 53(2), 2000, pp. 475
This review describes syntheses of structurally interesting and biologicall
y important heterocycles starting from suitably ortho-substituted maleanili
c acids via intramolecular Michael addition, condensation and dehydrative c
yclisation reactions.