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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Desulfovardenafil (imidazotriazinone intermediate) | CAS 224789-21-3

The preformed imidazotriazinone core in published vardenafil routes, carrying the ethoxyphenyl, methyl and propyl groups before installation of the sulfonylpiperazine unit that distinguishes the final active structure.

CAS224789-21-3
Molecular formulaC17H20N4O2
Molecular weight312.37 g/mol

Product overview

The fused imidazotriazinone ring, ortho-ethoxyphenyl group and methyl and propyl substituents are already assembled in this vardenafil intermediate. Also known as desulfovardenafil, CAS 224789-21-3 represents the neutral stage before aryl sulfonylation and installation of the sulfonylpiperazine unit. This reaction-stage identity is central to matching a purchase request. Structural analysis should establish the ethoxyphenyl arrangement, fused heterocycle and carbonyl together. Related-substances review can then address positional or alkoxy analogues and any species from other process stages relevant to the selected preparation. Define the chromatographic method and acceptance criteria in relation to the next aryl-functionalization step.

Chemical identity

Chemical name
2-(2-Ethoxyphenyl)-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(3H)-one
CAS number
224789-21-3
Molecular formula
C17H20N4O2
Molecular weight
312.37 g/mol

Application context

Published vardenafil routes functionalize the ethoxyphenyl portion of this imidazotriazinone with a sulfonyl group, then introduce N-ethylpiperazine. The fused core and its ethoxyphenyl, methyl and propyl substituents are already present in the starting material. Specify the unsulfonylated stage and use structural data to distinguish related alkoxy or ring-substitution variants. Set related-substance controls according to their behaviour in the next aryl-functionalization step.

Chemistry and synthetic role

The molecule combines a fused imidazole–triazine system with a lactam-type carbonyl and an ethoxy-substituted phenyl ring. Subsequent aryl functionalization changes the phenyl substituents while retaining the preassembled heterocyclic core.

Quality review

Identify the unsulfonylated stage

Use the complete name or structure with CAS 224789-21-3. The sulfonyl chloride and the piperazine-containing active are separate materials and require different specifications.

Confirm alkoxy and alkyl substitution

Ask for spectral evidence distinguishing the ethoxyphenyl, methyl and propyl arrangement from related heterocyclic or alkoxy analogues.

Review the next-step impurity profile

Agree chromatographic separation and limits for relevant positional, alkoxy and process-stage impurities according to their behaviour in the next aryl-functionalization step.

Preparing a specification

State CAS and the unsulfonylated imidazotriazinone structure, quantitative assay method, related-substances scope and residual-solvent basis. Clarify that no final-active salt specification is being requested.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, order quantity and destination. Request the applicable SDS and label to establish storage and handling conditions.

Documentation

Request identity spectra, a batch chromatogram and the analytical method supporting the proposed intermediate grade. Confirm availability of COA, SDS and residual-solvent information for the selected source.

Procurement questions

Is this vardenafil hydrochloride?

No. The sulfonylpiperazine group of vardenafil has not yet been installed.

Why use CAS with the intermediate name?

The vardenafil route contains several distinct intermediates; a stage number or generic name may be supplier-specific.

Which related substances matter before aryl functionalization?

Review positional and alkoxy analogues, together with any other process-stage species indicated by the proposed preparation, and agree chromatographic separation and limits.

Technical sources
  1. Desulfovardenafil, CID 135406983NCBI PubChem
  2. Imidazotriazinone intermediateBLD Pharmatech via Sigma-Aldrich
  3. Method for obtaining vardenafil and its saltsPL223869B1 / Google Patents
  4. Manufacturing of vardenafil and its saltsEuropean Patent Office EP3083629B1