ethyl 2-(1,4-dioxonaphthalen-2-yl)sulfanylacetate

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 63 mg (0.228 mmoles) ethyl 2-(1,4-dioxo-1,4-dihydronaphthalen-2-ylthio)acetate (7a) was mixed with 37 mg (0.228 mmoles) thiophene-2-sulfonamide in 2.5 ml dichloromethylene, to which at 0° C. was added 76 mg TiCl4.2THF followed by 70 μl triethylamine. The mixture was heated at 60° C. with microwave synthesizer (Initiator 8, Biotage) for 20 min. Diluted with dichloromethylene to 60 ml, the reaction mixture was washed with H2O and brine and dried over Na2SO4. After removal of Na2SO4, the filtrate was concentrated and the residue was purified with flash column (EtOAc/Hexane) affording title compound 58 mg (60.4%) as orange oil which was solidified on standing, m.p.: 110-112° C. Diluted with dichloromethylene to 60 ml the reaction mixture was washed with H2O and brine dried over Na2SO4 After removal of Na2SO4 the filtrate was concentrated the residue was purified with flash column (EtOAc/Hexane)