反应详情

Under inert gas atmosphere 37.2 mL (112 mmol) of a 3N solution of methyl magnesium bromide in THF are added dropwise to 17.1 g (55.8 mmol) 2-methyl-propane-2-sulfonic acid 4-bromo-3-fluoro-benzylideneamide (IX.1) in 170 mL THF at −78° C. The cooling bath is removed and stirring is continued for 2 h. After that time, the mixture is poured into sat. NH4Cl-solution (300 mL) and extracted with EtOAc. The organic layer is separated, washed with brine and dried over sodium sulphate. The solvent is removed by evaporation to yield the desired product.

1. customThe cooling bath is removed
2. additionAfter that time, the mixture is poured into sat. NH4Cl-solution (300 mL)
3. extractionextracted with EtOAc
4. customThe organic layer is separated
5. washwashed with brine
6. dry with materialdried over sodium sulphate
7. customThe solvent is removed by evaporation