1,6,6-Trimethyl-1H-chromeno[6,7-d]thiazol-2(6H)-one

Abstract

The title compound, C13H13NO2S, was prepared by a thermocyclization reaction from 3-methyl-6-(2-methylbut-3-yn-2-yloxy)benzo[d]thiazol-2(3H)-one. In the crystal structure, the methylthiazole unit is planar, while the pyran ring assumes a screw-boat conformation. Intramolecular C—H...O hydrogen bonding helps to stabilize the molecular structure.