Provided is a synthesis of cephalosporin derivatives, characterized by the use of the new intermediates for the preparation of cephalosporin derivatives, a crystalline toluene hemi-solvate of benzhydryl (6R,7R)-7β-[(phenylacetyl)amino]-3-[4-pyridyl-2-thiazolylthio]-3-cephem-4-carboxylate, and a crystalline 4-[2-[[(6R,7R)-7-amino-2 carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]-thio]-4-thiazolyl]-1-methyl-pyridinium chloride, hydrochloride (1:1:1), obtained by a specific process and processes for preparation thereof.
                            提供了
头孢菌素衍
生物的合成,其特点是利用新中间体制备
头孢菌素衍
生物,一种结晶
甲苯半溶剂的苄基(6R,7R)-7β-[(苯乙酰)
氨基]-3-[4-
吡啶基-2-
噻唑基
硫基]-3-头孢烯-4-
羧酸酯,以及一种结晶4-[2-[[(6R,7R)-7-
氨基-2-羧基-8-氧代-5-
硫代-1-
氮杂双环[4.2.0]辛-2-烯-3-基]-
硫基]-4-
噻唑基]-1-
甲基吡啶盐酸盐,通过特定工艺获得,并制备的工艺。