p-Toluenesulfonyl isocyanate → HCID 178498476, compound

Participants

Reaction Steps

According to the procedure of Wright, Synthesis, 1984, 1058, methyl 4-hydroxy-2-quinolinecarboxylate (2.03 g, 0.01 m) and p-toluenesulfonyl isocyanate (1.97 g, 0.01 m) were mixed in reagent grade acetonitrile at RT. The heterogeneous mixture was heated at reflux until the evolution of COz had ceased (ca 2-3 hours). During this time a yellow solid formed. After cooling to RT, the yellow solid was collected by filtration, washed with acetonitrile, and dried to give methyl 4-(p-toluenesulfonylimino)-1,4-dihydroquinoline-2-carboxylate (2.93 g, 82%), melting point of 264°-265° C. (dec.), as a yellow solid.

Provenance & Evidence