反应详情

N-(6-Bromo-7-oxo-4,5,6,7-tetrahydro-benzothiazol-2-yl)-acetamide (Stage T.3, 347 mg, 1.200 mmol) was dissolved in MeOH (10 mL) and 2-cyclopropyl-thioacetamide (Can. J. Chem 1995 Vol. 73 1468-1477, 166 mg, 1.440 mmol) and ammonium phosphomolybdate (225 mg, 0.120 mmol) were added. The RM was stirred at rt for 20 h then heated at 50° C. for 3 h, 60° C. for 2 h and then refluxed for 24 h. The RM was partitioned between EtOAc/H2O. The organic layer was dried over Na2SO4 and evaporated. The raw material was chromatographied with MPLC C18 H2O 0.1% TFA/CH3CN 0.1% TFA, gradient 0-50%. Product containing fractions were neutralized with NaHCO3, extracted with EtOAc and lyophilized from dioxane to give the title compound as a white solid (M+H=306.2; M−H=304.2; tR 5.12 min (Method F)).

1. temperaturethen heated at 50° C. for 3 h, 60° C. for 2 h
2. temperaturerefluxed for 24 h
3. customThe RM was partitioned between EtOAc/H2O
4. dry with materialThe organic layer was dried over Na2SO4
5. customevaporated
6. additionProduct containing fractions
7. extractionextracted with EtOAc