反应详情

To a suspension of (2-formamidothiazol-4-yl)-glyoxylic acid (6.0 g) in water (60 ml) and pyridine (6 ml) was added a solution of benzhydryl 2-aminooxyacetate (9.0 g) in tetrahydrofuran (40 ml). The reaction mixture was stirred at ambient temperature for 3 hours. To the resultant solution was added ethyl acetate (200 ml). The separated organic layer was washed with 5% hydrochloric acid (100 ml), a saturated aqueous sodium bicarbonate and a saturated aqueous sodium chloride, and then dried over magnesium sulfate. The solvent was distilled off to give 2-(2-formamidothiazol-4-yl)-2-benzhydryloxycarbonylmethoxyiminoacetic acid (syn isomer) (13.0 g), mp 143°-151° C.

1. washThe separated organic layer was washed with 5% hydrochloric acid (100 ml)
2. dry with materiala saturated aqueous sodium bicarbonate and a saturated aqueous sodium chloride, and then dried over magnesium sulfate
3. distillationThe solvent was distilled off