反应详情

温度

55 °C

A mixture of 0.975 g of the product of Step A and 4 ml of 50% aqueous formic acid was stirred for 10 minutes at 55° C. and after the addition of 4 ml of water, the mixture was vacuum filtered. The filtrate was evaporated under reduced pressure to dryness and the residue was effloresced with 2 ml of ethanol. The mixture was vacuum filtered and the product was washed with ethanol and then ether to obtain 0.428 g of pure 3-acetoxymethyl-7-[{2-(2-amino-4-thiazolyl)-2-methoxyiminoacetyl}amino]-ceph-3-eme-4-carboxylic acid in the syn configuration.

1. filtrationfiltered
2. customThe filtrate was evaporated under reduced pressure to dryness
3. filtrationfiltered
4. washthe product was washed with ethanol