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HONGKUN / PRODUCT DIRECTORY

D-7ACA | CAS 15690-38-7

A 3-hydroxymethyl cephalosporin nucleus with a free 7-amino group, D-7ACA appears in published cefuroxime intermediate chemistry, where the exact C3 substituent, stereochemical identity and assay basis guide material qualification.

CAS15690-38-7
Molecular formulaC8H10N2O4S
Molecular weight230.24 g/mol

Product overview

The hydroxymethyl group at C3 distinguishes D-7ACA from acetoxy-containing and deacetoxy cephalosporin nuclei. Its bicyclic framework contains a beta-lactam, a free 7-amino group and a carboxylic acid, with the defined 6R,7R configuration. CAS 15690-38-7 therefore identifies a particular amino nucleus rather than a general cephalosporin intermediate family. Published patent chemistry connects this material with a cefuroxime acid intermediate through introduction of a suitable acyl side chain. For purchasing, the short name should be accompanied by the structure and chemical form. Qualification should establish that the supplied material retains the intended nucleus and configuration, and clarify whether reported content is an assay of the free acid or a chromatographic area percentage.

Chemical identity

Chemical name
Deacetyl-7-aminocephalosporanic acid (D-7ACA)
CAS number
15690-38-7
Molecular formula
C8H10N2O4S
Molecular weight
230.24 g/mol

Application context

D-7ACA is used in a published route to a cefuroxime acid intermediate. Acylation of its free 7-amino group introduces a methoxyimino-containing furanyl side chain, while the C3 hydroxymethyl group remains part of the nucleus. For this application, specify the 6R,7R free acid and identify the related cephem nuclei and degradation products that the analytical method must separate. Assay on the agreed water and solvent basis helps establish the amount of nucleus available for charging.

Chemistry and synthetic role

The free 7-amino group is the acylation site identified in the cited route. The C3 hydroxymethyl group remains a separate structural feature. Neither a directly attached C3 hydroxy group nor a C3 methyl group describes the same nucleus.

Quality review

Check the C3 substituent

Confirm hydroxymethyl identity against the selected reference; related acetoxy or deacetoxy nuclei require separate assessment.

Review the defined configuration

Agree evidence for the 6R,7R nucleus and a related-substances method capable of addressing relevant stereochemical and beta-lactam changes.

Define free-acid content

Clarify water and residual-solvent corrections before comparing assay with HPLC area purity. The two results answer different questions.

Preparing a specification

Specify D-7ACA, CAS 15690-38-7, as the free acid with the required 6R,7R identity. State the assay basis, chromatographic method and route-relevant related-substance criteria; agree any water requirement rather than assuming a catalogue purity.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, quantity and destination. Agree storage and handling conditions using the actual supplied material’s SDS and label.

Documentation

Request the proposed specification, batch COA and current SDS. Confirm availability of identity evidence, the related-substances method and chromatograms, including the basis used to report free-acid assay.

Procurement questions

Is D-7ACA interchangeable with a deacetoxy nucleus?

No. The C3 hydroxymethyl group is part of this identity; a methyl substituent defines a different material.

Does a high HPLC area value establish usable content?

Not by itself. Agree the assay method and whether water or solvent corrections apply.

How is D-7ACA used in cefuroxime intermediate chemistry?

The published route acylates the free 7-amino group with a methoxyimino-containing furanyl component.

Technical sources
  1. PubChem CID 11031679: Deacetyl-7-aminocephalosporanic acidNCBI / PubChem
  2. 7-Aminodeacetylcephalosporanic acid, A2878Tokyo Chemical Industry
  3. CN109988183B: Environment-friendly preparation method of cefuroxime acid intermediateCNIPA patent publication via Google Patents