Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

5-Chloro-1-indanone | CAS 42348-86-7

A chlorinated fused-ring ketone supplying the indanone framework in indoxacarb intermediate chemistry, where the 5-chloro substitution pattern and related ring-isomer profile are key raw-material qualification points.

CAS42348-86-7
Molecular formulaC9H7ClO
Molecular weight166.60 g/mol

Product overview

5-Chloro-1-indanone combines a benzene ring and a five-membered cyclic ketone in one fused skeleton. The chlorine at position 5 marks the aromatic substitution pattern required in published indoxacarb routes. The ketone and its neighbouring methylene support the later functionalisation of this ring system. This starting material has no specified stereocentre; the stereochemical demands of advanced indoxacarb intermediates arise further along the sequence. At this stage, qualification should prioritise the correct chloroindanone isomer, related aromatic or cyclic ketones and assay basis. Published manufacturing literature specifically identifies the 7-chloro isomer as a relevant separation issue in some routes.

Chemical identity

Chemical name
5-Chloro-1-indanone
CAS number
42348-86-7
Molecular formula
C9H7ClO
Molecular weight
166.60 g/mol

Application context

Indoxacarb process chemistry uses the 5-chloroindanone skeleton as a foundation for more highly functionalised cyclic intermediates. Subsequent route development includes methoxycarbonyl-substituted indanones and stereoselective hydroxylation chemistry. The original 5-chloro pattern must therefore be established before those transformations are evaluated. Procurement of this earlier ketone should focus on positional-isomer control and other route-related substances rather than on an optical-purity specification that belongs to later chiral intermediates. Ask whether the analytical method distinguishes the 7-chloro analogue and whether residual starting materials or process-derived ketones are reported separately.

Chemistry and synthetic role

A benzene ring is fused to cyclopentanone, with chlorine on aromatic position 5. The carbonyl and adjacent methylene enable further ring functionalisation; this parent ketone has no stereogenic carbon.

Quality review

Resolve the 7-chloro analogue

Confirm a method capable of separating relevant chloroindanone positional isomers.

Match the ketone identity

Verify the 1-indanone carbonyl and 5-chloro substitution by structural analysis.

Review synthesis-related ketones

Agree limits for relevant residual precursors and cyclic or aromatic ketone impurities according to the selected source.

Preparing a specification

Specify 5-chloro-1-indanone, identity evidence, chromatographic assay and a resolved limit for the 7-chloro analogue where relevant. Include source-specific precursor and related-ketone 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

Why single out the 7-chloro isomer?

It is described as a route-related impurity in published preparation literature and may require explicit separation.

Is this an indanol?

No. Indanol is the alcohol counterpart and has different functionality.

Should optical purity be specified here?

This parent ketone has no stereocentre; chiral requirements apply to later substituted intermediates.

Technical sources
  1. PubChem CID 142599NCBI / PubChem
  2. 5-Chloro-1-indanoneSigma-Aldrich
  3. Improved process for preparing 5-chloro-indanoneChinese patent CN112939756B
  4. Cinchonine derivatives for high-optical-purity indoxacarb intermediate synthesisChinese patent CN114105972A