Abstract
A three‐component synthesis of 3‐aminomethylene‐thiochroman‐2,4‐dione derivatives 2–22 by the condensation reactions of amines, α‐aminoacids, ureas, and carbamates with 4‐hydroxythiocoumarin 1, respectively, in the presence of triethyl orthofomate is described.
Acknowledgments
We would like to thank Korea Research Council for Industrial Science and Technology (KK‐0301‐N0) for financial support.