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HONGKUN / PRODUCT DIRECTORY

(2S,3S)-Benzyl-protected posaconazole phenolic side-chain intermediate | CAS 184177-83-1

A stereodefined phenolic side-chain fragment in published posaconazole assembly, combining a diarylpiperazine–triazolone system with a benzyl-protected alcohol; the free phenol and protected side-chain oxygen have different synthetic roles.

CAS184177-83-1
Molecular formulaC30H35N5O3
Molecular weight513.6 g/mol

Product overview

A free phenol and an O-benzyl-protected side-chain alcohol give this advanced posaconazole fragment two different oxygen functions. Its diarylpiperazine–triazolone system contains the specified (2S,3S) side chain. Preserve both stereochemical identity and protection state when qualifying the phenolic component for ether-forming assembly.

Chemical identity

Chemical name
(2S,3S)-Benzyl-protected posaconazole phenolic side-chain intermediate
CAS number
184177-83-1
Molecular formula
C30H35N5O3
Molecular weight
513.6 g/mol

Application context

The free phenol supplies the ether oxygen when this fragment is joined to a tetrahydrofuran tosylate in a reported route to benzyl-protected posaconazole. The O-benzyl group on the chiral side chain remains a separate protection feature. Review the two stereocentres, free-phenol content and protection state for the intended coupling; quantitative reference use additionally requires assigned-content data.

Chemistry and synthetic role

The molecule combines two aryl groups linked through piperazine with a triazolone and a chiral O-benzyl-protected alkyl substituent. The free phenol is the documented coupling site. Protection state and nitrogen-substitution positions should be checked alongside the (2S,3S) designation.

Quality review

Establish the side-chain configuration

Specify both side-chain stereocentres and agree an isomer-selective method. Include optical rotation as supporting characterization when required by the selected grade.

Differentiate the two oxygen functions

Confirm the free phenol and intact O-benzyl ether, distinguishing deprotected or already coupled material.

Match the triazolone substitution

Use a complete structural reference to reconcile ring numbering and nitrogen substitution across supplier names.

Define reference-material expectations

For impurity quantification, check content assignment and supporting evidence separately from synthesis-grade purity.

Preparing a specification

Identify CAS 184177-83-1 with the (2S,3S) protected structure, including free phenol and O-benzyl group. Define isomer controls and related-substance methods, then state the assay basis and any justified water or residual-solvent requirements.

Packaging and storage

Agree packaging, net weight and transport arrangements for the selected grade, quantity and destination. Confirm storage and handling conditions using the current SDS for the proposed material.

Documentation

Request structural and stereochemical evidence, chromatograms addressing the protection state and the proposed specification. Confirm availability of COA/SDS; if used as an analytical reference, also confirm assigned-content and traceability data.

Procurement questions

Which hydroxyl function participates in the documented coupling?

The free phenolic group; the side-chain oxygen is present as a benzyl ether.

Is this already benzyl-protected posaconazole?

It is the separate phenolic side-chain fragment before connection to the tetrahydrofuran portion.

Why do some names use different stereochemical locants?

The same side chain can be numbered differently. Compare full structures rather than the locant numbers alone.

Which protection-state data are useful before coupling?

Confirm the free phenol and intact O-benzyl ether, with separation of relevant deprotected or already coupled material.

Technical sources
  1. PubChem CID 46223297: properties and CAS synonym crosscheckNCBI / PubChem
  2. 2-[(1S,2S)-1-Ethyl-2-(phenylmethoxy)propyl]-…triazol-3-one — TRC-E925535LGC Standards / TRC
  3. EP3353169B1 — Crystalline forms of posaconazole intermediate and process for the preparation of amorphous posaconazoleEuropean Patent Office / Biocon Limited