头孢唑啉杂质D可用于有机合成中间体和医药中间体,在实验室研发及化工医药生产过程中广泛运用。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
头孢菌素 C | cephalosporin C | 61-24-5 | C16H21N3O8S | 415.424 |
7-氨基头孢烷酸 | 7-Aminocephalosporanic acid | 957-68-6 | C10H12N2O5S | 272.282 |
7-氨基-3-{[(5-甲基-1,3,4-噻二唑-2-基)硫]甲基}头孢霉素烷酸 | (6R,7R)-7-amino-3-(5-methyl-1,3,4-thiadiazol-2-ylthiomethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | 30246-33-4 | C11H12N4O3S3 | 344.439 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 3-(((1,3,4-thiadiazol-2-yl)thio)methyl)-7-(2-(1H-tetrazol-1-yl)acetamido)-3-cephem-4-carboxylic acid | —— | C13H12N8O4S3 | 440.487 |
—— | 3-(((5-METHYL-1,3,4-THIADIAZOL-2-YL)THIO)METHYL)-7-(2-(1H-TETRAZOL-1-YL)ACETAMIDO)-3-CEPHEM-4-CARBOXYLIC ACID | —— | C14H14N8O4S3 | 454.514 |
头孢唑啉 | cefazolin | 25953-19-9 | C14H14N8O4S3 | 454.514 |
—— | 7-(1H-tetrazol-1-yl)acetamido-3-(5-aminomethyl-1,3,4-thiadiazol-2-yl)thiomethyl-3-cephem-4-carboxylic acid | —— | C14H15N9O4S3 | 469.529 |
A sequential continuous-flow synthesis of cefazolin, which is a vital first-choice drug used for the prevention of primary infection in most surgeries, was investigated. Rapid flow and efficient mixing of substrates in suitable flow reactors enabled the target compound to be obtained in a short period without any intermediate isolation. A flexible system design that can be applied from a small-scale to medium-scale synthesis was demonstrated, and optimal parameters were established to realize the synthesis. A 0.3 mol/h scale synthesis was achieved in 54% isolated yield with 13.75 g/h dL space–time–yield of cefazolin. The obtained material had an acceptable impurity profile and could be purified by simple acid–base extraction and precipitation.