Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

EATG — Aminothiazolyl glyoxylate ester | CAS 64987-08-2

EATG places an alpha-keto ester beside a free aminothiazole group, making it a documented precursor in oxime-side-chain chemistry; buyers should confirm the keto stage, amino protection state and ester identity before specifying quality.

CAS64987-08-2
Molecular formulaC7H8N2O3S

Product overview

The adjacent ketone and ethyl ester functions distinguish EATG from a simple aminothiazoleacetate. CAS 64987-08-2 identifies ethyl 2-(2-aminothiazol-4-yl)-2-oxoacetate, with an unprotected amino group on the thiazole ring. The molecule has not yet acquired an oxime function, so an oxime Z/E specification does not describe this material. Published patents place it upstream of protected aminothiazole oxime side chains, including cephalosporin-related chemistry and a separate beta-lactam research programme. For qualification, establish the exact precursor stage and distinguish the ethyl ester from its corresponding acid or amino-protected derivatives. Assay and impurity methods should address that structure rather than borrow criteria from a later oxime intermediate.

Chemical identity

Chemical name
Ethyl 2-(2-aminothiazol-4-yl)-2-oxoacetate (EATG)
CAS number
64987-08-2
Molecular formula
C7H8N2O3S

Application context

EATG is used in published routes to oximino aminothiazole side chains for cephalosporin derivatives. Its alpha-keto ester provides the precursor stage for oxime formation, while the thiazole amino group remains available for protection. It also appears in research on protected aminothiazole oxime-acid components for deuterated beta-lactam compounds. Buyers should identify the intended protection, oxime-forming and ester-conversion sequence, then select impurity controls appropriate to the starting keto ethyl ester.

Chemistry and synthetic role

The molecule combines a free 2-amino group on thiazole with an alpha-keto ethyl ester at the ring's 4-position. These are distinct functional sites. An oxime, an amino-protected derivative or the corresponding acid requires its own identity.

Quality review

Confirm the keto-ester stage

Verify the 2-oxo structure and exclude substitution of an already formed methoxyimino or hydroxyimino derivative.

Check amino protection state

The specified material has a free thiazole amino group; formylated or tritylated derivatives are different inputs.

Review ester-related composition

Discuss the corresponding acid and other route-relevant components, and distinguish area purity from assay on the agreed reporting basis.

Preparing a specification

Specify EATG, CAS 64987-08-2, as the free-amino keto ethyl ester. State assay, chromatographic criteria and any water requirement justified by the receiving process; do not add oxime-isomer limits to this precursor.

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 specification, COA and SDS. Confirm availability of identity data showing the keto ester and free amino group, together with chromatograms and the basis of any acid-related impurity result.

Procurement questions

Does EATG have a Z oxime configuration?

No. It is a keto ester, before formation of an oxime.

Is it the same as aminothiazoleacetic acid ethyl ester?

No. The additional keto group changes the structure and reactivity.

Where does EATG enter oxime-side-chain synthesis?

It is the keto-ester precursor. Oxime formation, amino protection and ester conversion are subsequent structural stages to specify for the selected route.

Technical sources
  1. PubChem CID4356513: Ethyl 2-(2-aminothiazol-4-yl)-2-oxoacetateNCBI / PubChem
  2. Ethyl 2-(2-aminothiazol-4-yl)-2-oxoacetate E1159Tokyo Chemical Industry
  3. GB1604971A: 7-(oximino-(2-aminothiazol-4-yl)acetamido) cephalosporanic acid derivativesUK patent publication via Google Patents / Hoechst
  4. US10093666B2: Deuterated O-sulfated beta lactam hydroxamic acids and deuterated N-sulfated beta lactams, example 34USPTO patent publication via Google Patents