Triethylamine → tert-Butyl (E)-3-[6-(4-oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]-2-propenoate

Participants

Reaction Steps

tert-Butyl (E)-3-(6-cyano-2-pyridyl)-2-propenoate (2.32 g, 10.1 mmol) and methyl thiosalicylate (1.86 g, 11.0 mmol) were dissolved in toluene (12 ml), and triethylamine (1.63 g, 25.7 mmol) was added thereto. The reaction mixture was refluxed for 38 hrs, concentrated, subjected to a silica gel column chromatography and eluted with hexane-ethyl acetate (5:2, v/v) to give the titled compound (0.78 g, 27%) as white crystals.

Provenance & Evidence