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HONGKUN / PRODUCT DIRECTORY

Meropenem side-chain thiol (2S,4S) | CAS 96034-64-9

This 2S,4S pyrrolidine supplies the sulfur-bearing side chain in a documented meropenem route, combining a free thiol, dimethylamide and protected ring nitrogen; stereochemical evidence and thiol-related composition are central purchasing considerations.

CAS96034-64-9
Molecular formulaC15H19N3O5S
Molecular weight353.4 g/mol

Product overview

The meropenem side-chain name describes a role, while CAS 96034-64-9 identifies the particular protected thiol required here. Its five-membered pyrrolidine ring carries a dimethylcarbamoyl group at C2 and a free mercapto group at C4, with 2S,4S configuration. The ring nitrogen is protected as a 4-nitrobenzyloxycarbonyl carbamate. The compound itself has no beta-lactam ring and is not meropenem. A published patent uses this side-chain component in assembly with an activated carbapenem nucleus. Before purchasing, confirm both stereocentres and the retained nitrogen-protecting group, then agree how free-thiol content and relevant sulfur-related substances will be evaluated. A generic side-chain label cannot distinguish protected, deprotected or sulfur-protected alternatives.

Chemical identity

Chemical name
4-Nitrobenzyl (2S,4S)-2-(dimethylcarbamoyl)-4-mercaptopyrrolidine-1-carboxylate
CAS number
96034-64-9
Molecular formula
C15H19N3O5S
Molecular weight
353.4 g/mol

Application context

This protected mercaptopyrrolidine supplies the sulfur-bearing side chain in a published meropenem route. The free thiol links the 2S,4S pyrrolidine fragment to an activated carbapenem nucleus, with the ring nitrogen protected as a 4-nitrobenzyloxycarbonyl carbamate. Match the selected grade to this coupling stage by confirming both stereocentres, the N-protecting group and free-thiol content. A related-substances method can be agreed to distinguish disulfide-related species and relevant protected precursors.

Chemistry and synthetic role

The pyrrolidine dimethylamide is distinct from a dimethylamino substituent. The ring nitrogen carries the protective carbamate, while sulfur is present as a free thiol. Altering either protection state changes the required route input.

Quality review

Establish both stereocentres

Confirm 2S,4S identity with evidence appropriate to enantiomeric and diastereomeric composition; a single rotation value may not resolve every isomer.

Assess the free thiol

Agree methods for thiol content and relevant disulfide-related species, with limits justified by the receiving coupling process.

Verify nitrogen protection

Confirm the 4-nitrobenzyloxycarbonyl group and review relevant sulfur-protected or precursor components rather than accepting an unspecified side-chain grade.

Preparing a specification

Identify CAS 96034-64-9 with 2S,4S configuration, a free C4 thiol and the specified ring-N carbamate. Define stereochemical testing, assay and sulfur-related impurity criteria; distinguish the protected intermediate from any deprotected salt.

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 identity and stereochemical data, the proposed specification, COA and current SDS. Confirm availability of thiol/disulfide-related chromatograms and methods, and a clear statement of the nitrogen-protection state.

Procurement questions

Does this intermediate contain a beta-lactam ring?

No. It is a protected pyrrolidine side chain that is connected to a separate carbapenem nucleus.

Is optical rotation alone enough?

Its suitability depends on the agreed method; enantiomeric and diastereomeric composition may need more specific evidence.

Does the dimethylcarbamoyl group contain a free tertiary amine?

It is an N,N-dimethylamide, a different functionality from a dimethylamino group.

Technical sources
  1. PubChem CID10871907: Meropenem side chainNCBI / PubChem
  2. 4-Nitrobenzyl (2S,4S)-2-(dimethylcarbamoyl)-4-mercaptopyrrolidine-1-carboxylate N0828Tokyo Chemical Industry
  3. WO2011141847A1: An improved process for the preparation of meropenemWIPO patent publication via Google Patents
  4. 2023年第2批拟增补列入中国现有化学物质名录的信息表,序号3中华人民共和国生态环境部