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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-Phenylbutanoyl chloride | CAS 36854-57-6

An alpha-phenyl acyl chloride with a stereogenic carbon, useful in acylation and kinetic-resolution research; an unqualified chemical assay does not establish enantiomeric composition.

CAS36854-57-6
Molecular formulaC10H11ClO
Molecular weight182.64 g/mol

Product overview

The carbon next to the acid chloride bears phenyl, ethyl and hydrogen, creating a stereogenic centre in 2-phenylbutanoyl chloride. The catalogue identity does not specify one absolute configuration. This is a material distinction when the reagent is intended for stereochemical work: a chemically pure sample may still contain both enantiomers. It also differs from 4-phenylbutanoyl chloride, where phenyl lies at the opposite end of the chain. Procurement should connect the required positional structure and stereochemical composition with an intact acyl chloride assay and appropriate related-substance controls.

Chemical identity

Chemical name
2-Phenylbutanoyl chloride
CAS number
36854-57-6
Molecular formula
C10H11ClO
Molecular weight
182.64 g/mol

Application context

Racemic 2-phenylbutyryl chloride has been evaluated in kinetic resolution using chiral secondary alcohols. Such studies examine unequal reaction rates of the two enantiomers rather than treating the starting material as an enantiopure reagent. Separately, individual enantiomers of this acyl chloride are described as derivatization reagents in stereochemical analysis. A buyer planning an analytical derivatization should therefore specify the required configuration and enantiomeric purity explicitly; the unspecified CAS record and total chemical purity are insufficient to make that selection.

Chemistry and synthetic role

Ph–CH(CH2CH3)–C(O)Cl contains an alpha stereocentre beside an acyl chloride. No R or S configuration is assigned by the product name here.

Quality review

Define the stereochemical requirement

State racemic, unspecified or a specific enantiomer before comparing grades.

Verify alpha-phenyl placement

Identity testing should establish phenyl at carbon 2.

Assess acid chloride integrity

Agree parent-acid and related acyl-compound controls alongside assay.

Preparing a specification

Specify 2-phenyl connectivity, intended stereochemical composition, chiral method where required, intact acyl chloride assay and parent-acid limits.

Packaging and storage

Packaging and net weight are agreed for the selected grade, order quantity and destination. Check the actual supplier SDS and label for storage and transport requirements.

Documentation

Request a batch COA, SDS and the analytical methods for the acceptance criteria below. Confirm which supporting chromatograms and identity data are available from the selected manufacturer.

Procurement questions

Does high chemical purity mean a single enantiomer?

No. A separate stereochemical measurement is required.

Is 4-phenylbutanoyl chloride interchangeable?

Its connectivity differs and it supplies another acyl fragment.

What should a chiral derivatization enquiry include?

Required configuration, enantiomeric criteria, active assay and the intended analytical method.

Technical sources
  1. PubChem CID 98173NCBI / PubChem
  2. 2-Phenylbutyryl chlorideTCI
  3. 2-Phenylbutyryl chloride research applicationsSigma-Aldrich