HuagongsheHuagongshe Chemistry Print Report · For research reference only
Phosphorus oxychloride → 7-[2-(2-Formamidothiazol-4-yl)-2-methoxyiminoacetamido]-3-(5-t-butoxycarbonylaminomethyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Phosphorus oxychloride | HCID 24813 | — |
| Reactant | Acetamide, 2-(trimethylsilyl)- | HCID 357676 | — |
| Reactant | 2-(2-Formylamino-1,3-Thiazol-4-Yl)-2-(Methoxyimino)Acetic Acid | HCID 2724511 | — |
| Reactant | Bistrimethylsilylacetamid | HCID 11708267 | — |
| Reactant | 7-Amino-3-(5-t-butoxycarbonylaminomethyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid | HCID 14207412 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Solvent | Ethyl Acetate | HCID 8857 | — |
| Product | 7-[2-(2-Formamidothiazol-4-yl)-2-methoxyiminoacetamido]-3-(5-t-butoxycarbonylaminomethyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid | HCID 131711873 | 62.6% |
Reaction Steps
A solution of 7-amino-3-(5-t-butoxycarbonylaminomethyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid (4.6 g), trimethylsilylacetamide (7.86 g) and bis(trimethylsilyl)acetamide (4.0 g) in ethyl acetate (50 ml) and a solution of dimethylformamide (0.804 g), phosphoryl chloride (1.69 g) and 2-(2-formamidothiazol-4-yl)-2-methoxyiminoacetic acid (syn isomer, 12.3 g) were treated in a similar manner to that of Example 1-(1) to give 7-[2-(2-formamidothiazol-4-yl)-2-methoxyiminoacetamido]-3-(5-t-butoxycarbonylaminomethyl-1,3,4-thiadiazol-2-ylthiomethyl)-3-cephem-4-carboxylic acid (syn isomer, 4.2 g).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04220761 |
| Source dataset | uspto-grants-1980_09 |
| ORD ID | ord-873eb7c406b344188f0b6087545b6f72 |
| Source note | uspto-grants-1980_09 |