反应详情

To a solution of 2-aminooxy-N-methyl-acetamide (1.71 g, 16.4 mmol) obtained in Step B in a mixed solvent of methylene chloride (50 ml) and THF (25 ml) was added 3,4-difluoro-2-(2-fluoro-4-iodo-phenylamino)-5-formyl-N-(2-hydroxy-ethoxy)-benzamide (3.94 g, 8.20 mmol) obtained in Step F of Example 1 at room temperature, and the mixture was stirred for 15 hours. The reaction mixture was concentrated under reduced pressure, and methylene chloride (40 ml) was added to the resultant residue to precipitate a solid, which was filtered and washed with methylene chloride. The resultant solid was dried under reduced pressure to give (E)-3,4-difluoro-2-(2-fluoro-4-iodo-phenylamino)-N-(2-hydroxy-ethoxy)-5-[methylcarbamoylmethoxyimino-methyl]-benzamide (3.57 g, 77%) as a white solid.

1. concentrationThe reaction mixture was concentrated under reduced pressure, and methylene chloride (40 ml)
2. additionwas added to the resultant residue
3. customto precipitate a solid, which
4. filtrationwas filtered
5. washwashed with methylene chloride
6. customThe resultant solid was dried under reduced pressure