反应详情

Iodotrimethylsilane (6.64 mL, 47 mmol) was added to a solution of 3-hydroxy-5-[(1R)-2-methoxy-1-methylethoxy]-N-(1-methyl-1H-pyrazol-3-yl)benzamide (2.86 g, 9.38 mmol) in acetonitrile (120 mL) and the resultant mixture stirred for 24 hours. Methanol (30 mL) was added and the mixture stirred for 30 minutes, saturated potassium carbonate (30 mL) and saturated sodium thiosulphate (30 mL) were then added and the mixture stirred for 20 mins. The acetonitrile was removed in vacuo and water (50 mL) added. The mixture was adjusted to pH4 with 1M hydrochloric acid, extracted into ethyl acetate (3×100 mL) and the combined extracts washed with brine (50 mL), dried (MgSO4) and evaporated to a residue which was chromatographed on silica, eluting with a gradient of 0-50% methanol in ethyl acetate, to give the desired compound (1.75 g).

1. stirringthe mixture stirred for 20 mins
2. customThe acetonitrile was removed in vacuo and water (50 mL)
3. additionadded
4. extractionextracted into ethyl acetate (3×100 mL)
5. washthe combined extracts washed with brine (50 mL)
6. dry with materialdried (MgSO4)
7. customevaporated to a residue which
8. customwas chromatographed on silica
9. washeluting with a gradient of 0-50% methanol in ethyl acetate