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HONGKUN / PRODUCT DIRECTORY

8-Methoxyphthalazinone benzoic acid derivative | CAS 1174044-71-3

An 8-methoxy-substituted phthalazinone linked to a fluorobenzoic acid through a methylene group, offering a defined heteroaromatic acid scaffold for derivative synthesis and structure-led research qualification.

CAS1174044-71-3
Molecular formulaC17H13FN2O4
Molecular weight328.29 g/mol

Product overview

The structure brings together three identifying features: an 8-methoxyphthalazinone, a methylene connection and a benzoic acid bearing fluorine at position 2. The free carboxyl group is the evident handle for preparing acid derivatives, while the phthalazinone lactam and methoxy substituent form part of the retained scaffold. A purchase order should include the full chemical name or a structure, since shortened phthalazinone descriptions can omit the methoxy group or confuse substitution positions. Qualification should combine structural identification with a suitable HPLC method and confirmation of the acid form.

Chemical identity

Chemical name
2-Fluoro-5-((8-methoxy-4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoic acid
CAS number
1174044-71-3
Molecular formula
C17H13FN2O4
Molecular weight
328.29 g/mol

Application context

This scaffold is suited to research programmes evaluating substituted phthalazinone carboxylic acids and their derivatives. The benzoic acid functionality provides a point for planned amide or ester elaboration, while the 8-methoxy group defines the heterocyclic substitution retained in that work. Selection should be based on the intended structure: compare the methoxy location, fluorine location and methylene linkage against the project drawing. For method development, establish the chromatographic resolution of positional or demethylated analogues when relevant to the selected manufacturing route.

Chemistry and synthetic role

A fluorobenzoic acid is connected through CH2 to an 8-methoxyphthalazinone containing adjacent ring nitrogens and a lactam carbonyl.

Quality review

Verify the 8-methoxy group

Use NMR or equivalent structural evidence locating the methoxy substituent.

Confirm the free acid

Distinguish the carboxylic acid from an ester or salt.

Separate closely related analogues

Define HPLC resolution and reporting for relevant positional or demethylated compounds.

Preparing a specification

Specify CAS 1174044-71-3 with the complete 8-methoxyphthalazinone structure, free-acid form, HPLC assay and relevant analogue 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

Can a generic phthalazinone acid name be used?

Include the full substitution pattern and CAS to avoid selecting a different analogue.

Should the acid form be stated?

Yes; it determines the molecular composition and route input.

Does molecular mass prove the positions?

No; structural information is needed for positional assignment.

Technical sources
  1. PubChem CID 57791817NCBI / PubChem
  2. 2-Fluoro-5-((8-methoxy-4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoic acidFisher Scientific / eMolecules
  3. 2-Fluoro-5-((8-methoxy-4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoic acid SDSIndagoo / Cymit