反应详情

(6R,7R)-7-Amino-3-[[[5-(3,4-dihydroxyphenyl)-2-phenyl-4-pyrimidinyl]thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (1.02 g) (2 mmol) are suspended in 25 ml of water and 25 ml of acetonitrile. While stirring there are added dropwise thereto at 0° C. 27 ml of 0.1N aqueous potassium hydroxide and the solution is treated portionwise with 1.0 g (3 mmol) of 2-amino-4-thiazolethioglyoxylic acid S-(2-benzothiazolyl) ester. The mixture is stirred at 0° C. for 1 hour and at 15°-20° C. for 2 hours. The suspension is now filtered and filter material is washed with water. The mother liquor and wash solution are combined, washed with ethyl acetate and finally acidified (pH~4) with dilute, aqueous hydrochloric acid. The precipitated product is filtered off under suction and washed in succession with water and diethyl ether. After drying in a high vacuum at room temperature there is obtained 0.5 g of (6R,7R)-7-(2-amino-4-thiazoleglyoxylamido)-3-[[(5-(3,4-dihydroxy-phenyl)-2-phenyl-4-pyrimidinyl]thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid as a yellow powder.

1. additionare added dropwise
2. customat 0° C
3. stirringThe mixture is stirred at 0° C. for 1 hour and at 15°-20° C. for 2 hours
4. filtrationThe suspension is now filtered
5. filtrationfilter material
6. washis washed with water
7. washThe mother liquor and wash solution
8. washwashed with ethyl acetate
9. additionwith dilute
10. filtrationThe precipitated product is filtered off under suction
11. washwashed in succession with water and diethyl ether
12. customAfter drying in a high vacuum at room temperature