The present invention relates to a new, simple, and easy process for preparing cephalosporin antibiotics of the following sub-formulas (I), such as cefixime. The process comprises acylating a 7-amino cephalosporanic acid derivative of the following sub-formulas (III) with a crystalline aminothiazole compound of the following sub-formulas (II):
1
wherein R
1
and R
2
are the same or different and independently represent H, a C
1-4
alkyl or C
3-5
cycloalkyl group, and the acid in the acid addition salt represents an inorganic acid, such as hydrochloric acid, or an organic acid, such as formic acid or acetic acid.
本发明涉及一种简单易行的新工艺,用于制备下列亚式(I)的
头孢菌素类抗生素,如头孢克
肟。该工艺包括将下列子式(III)的 7-
氨基
头孢菌素衍
生物与下列子式(II)的
氨基
噻唑化合物结晶酰化:
1
其中 R
1
和 R
2
相同或不同,且各自代表 H、C
1-4
烷基或 C
3-5
环烷基,而酸加成盐中的酸代表
无机酸,如
盐酸,或有机酸,如
甲酸或
乙酸。