(E)-2-[2-(1-Naphthyl)vinyl]-3-tosyl-2,3-dihydro-1,3-benzothiazole

The title compound, C26H21NO2S2, which consists of a benzothiazole skeleton with alpha-naphthylvinyl and tosyl groups at positions 2 and 3, respective ly, was prepared by palladium- copper-catalyzed heteroannulation. The E con figuration of the molecule about the vinyl C=C bond is established by the b enzothiazole-naphthyl C-C-C-C torsion angle of 177.5 (4) degrees . The five -membered heterocyclic ring adopts an envelope conformation with the Csp(3) atom 0.380 (6) A from the C2NS plane. The two S-C [1.751 (4) and 1.838 (4) A] and two N-C [1.426 (5) and 1.482 (5) A] bond lengths in the thiazole ri ng differ significantly.