Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

5-(4-Chlorobutyl)-1-cyclohexyl-1H-tetrazole | CAS 73963-42-5

A tetrazole side-chain partner in documented cilostazol synthesis, carrying cyclohexyl substitution at N1 and a four-carbon terminal-chloride chain at C5 for construction of the downstream ether linkage.

CAS73963-42-5
Molecular formulaC11H19ClN4
Molecular weight242.75 g/mol

Product overview

Two substitution positions define this tetrazole intermediate. The cyclohexyl group is attached to N1, while C5 carries a 4-chlorobutyl chain. CAS 73963-42-5 therefore specifies both the heterocyclic substitution pattern and the length of the linker. The chlorine is covalently attached at the chain end; this is not a hydrochloride salt. Published cilostazol chemistry uses that terminal chloride-containing fragment in assembly with a hydroxyquinolinone partner. For qualification, the relevant questions concern correct tetrazole connectivity, the intact four-carbon chain and related substances that could affect the selected coupling. A generic 'tetrazole purity' description leaves these distinctions unresolved. Any proposed analytical panel should be linked to the intended intermediate step rather than copied from a finished-API specification.

Chemical identity

Chemical name
5-(4-Chlorobutyl)-1-cyclohexyl-1H-tetrazole
CAS number
73963-42-5
Molecular formula
C11H19ClN4
Molecular weight
242.75 g/mol

Application context

5-(4-Chlorobutyl)-1-cyclohexyl-1H-tetrazole is used with 6-hydroxy-3,4-dihydroquinolin-2(1H)-one in published cilostazol synthesis. It supplies the N1-cyclohexyl tetrazole and four-carbon linker; the terminal chloride marks the site used to form the connecting ether. Confirm the tetrazole substitution position and intact chlorobutyl chain. Agree related-substance controls for these structural features and the chosen assembly step.

Chemistry and synthetic role

The N1-cyclohexyl tetrazole bears its carbon substituent at C5. A terminal C–Cl bond on the four-carbon chain is distinct from ionic chloride and provides the documented linkage-forming functionality.

Quality review

Verify the tetrazole N position

Confirm N1-cyclohexyl connectivity and consider discrimination from any relevant N-substitution isomer.

Check linker identity

Establish the four-carbon chain and terminal chloride rather than a different chain length or substituted end group.

Define intermediate-specific related substances

Select relevant precursor, positional-isomer and altered-chain controls for the intended coupling, with acceptance criteria defined for this tetrazole intermediate.

Preparing a specification

Specify CAS, N1-cyclohexyl/C5-(4-chlorobutyl) structure and chemical assay method. Agree relevant tetrazole-isomer and linker-related controls with the process team; numerical limits depend on the proposed grade and use.

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 COA, SDS and structural identity evidence. Confirm whether the proposed analytical method resolves the relevant tetrazole substitution and chain-related species, and request supporting chromatograms if needed.

Procurement questions

Is this a hydrochloride?

No. Chlorine is part of the terminal carbon–chlorine bond.

Which fragment does it supply to cilostazol chemistry?

The cyclohexyl tetrazole and four-carbon side chain; the hydroxyquinolinone is a separate partner.

Which structural impurities matter during qualification?

Agree methods for relevant tetrazole substitution variants and chain-related species, using the intended assembly step to set acceptance criteria.

Technical sources
  1. PubChem CID 11218739: properties and CAS synonymsNCBI / NLM / NIH
  2. 5-(4-Chlorobutyl)-1-cyclohexyl-1H-tetrazole C2013Tokyo Chemical Industry
  3. US20060100437A1 — Process for producing carbostyril derivativesUS patent publication / Google Patents