HuagongsheHuagongshe Chemistry Print Report · For research reference only
Phosphorus oxychloride → 7-[2-(2-Formamidothiazol-4-yl)-2-(tert-butoxycarbonylmethoxyimino)acetamido]-3-cephem-4-carboxylic acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Phosphorus oxychloride | HCID 24813 | — |
| Reactant | Bistrimethylsilylacetamid | HCID 11708267 | — |
| Reactant | (6R)-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid | HCID 12941984 | — |
| Reactant | 2-t-Butoxycarbonylmethoxyimino-2-(2-formamidothiazol-4-yl)acetic acid | HCID 54390951 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Solvent | Ethyl Acetate | HCID 8857 | — |
| Product | 7-[2-(2-Formamidothiazol-4-yl)-2-(tert-butoxycarbonylmethoxyimino)acetamido]-3-cephem-4-carboxylic acid | HCID 131712484 | 58.3% |
Reaction Steps
A solution of 2-(2-formamidothiazol-4-yl)-2-(tert-butoxycarbonylmethoxyimino)acetic acid (syn isomer, 3.2 g.), N,N-dimethylformamide (0.852 g.) and phosphoryl chloride (1.79 g.) in ethyl acetate (34 ml.) and a solution of 7-amino-3-cephem-4-carboxylic acid (1.95 g.) and bis(trimethylsilyl)acetamide (9.9 g.) in ethyl acetate (19.5 ml.) were treated in a similar manner to that of Example 15-(1) to give 7-[2-(2-formamidothiazol-4-yl)-2-(tert-butoxycarbonylmethoxyimino)acetamido]-3-cephem-4-carboxylic acid (syn isomer, 2.9 g.).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04425341 |
| Source dataset | uspto-grants-1984_01 |
| ORD ID | ord-4f8f7515ce004b3d8cea6621002e33bd |
| Source note | uspto-grants-1984_01 |