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Product Code B3311-5g
Price $63 ex. VAT

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A fluorinated benzoic acid building block

For the synthesis of APIs


4-Fluoro-3-methylbenzoic acid (CAS number 403-15-6), is a meta-toluic acid with a fluoride group at the 4-position. 4-Fluoro-3-methylbenzoic acid serves as a versatile building block for the synthesis of active pharmaceutical ingredients (APIs), as its functional group can be directly used or easily converted to alternative functional groups. The carboxylic acid group of 4-fluoro-3-methylbenzoic acid enables it to be attached to molecular scaffolds. Alternatively, it can be reduced to a hydroxy/aldehyde group for other type of reactions. The methyl group can be functionalised by bromide through a benzylic bromination reaction. The resulting brominated product can then be applied in the synthesis of bicyclic heterocycles.

An analogue of imidazopyridine based on 4-fluoro-3-methylbenzoic acid exhibits a potency of 0.1 nM as an anticoccidial agent.

Multiple functional groups

Multiple functional groups

For facile synthesis

Fluorinated benzoic acid building block

Fluorinated benzoic acid building block

For drug discovery, medicinal chemistry, and biochemistry

competitively priced 403-15-6

Low Cost

Competitively priced, high quality product

High purity 403-15-6

High purity

>97% High purity

General Information

CAS Number 403-15-6
Chemical Formula C8H7FO2
Full Name 4-Fluoro-3-methylbenzoic acid
Molecular Weight 154.14 g/mol
Synonyms 4-Fluoro-m-toluic acid
Classification / Family Fluorinated building block, Benzoic acid building blocks, APIs

Chemical Structure

4-Fluoro-3-methylbenzoic acid chemical structure, CAS 403-15-6
4-Fluoro-3-methylbenzoic acid chemical structure, CAS 403-15-6

Product Details

Purity 97%
Melting Point Tm = 164 °C – 168 °C
Appearance White powder

MSDS Documentation

4-Fluoro-3-methylbenzoic acid4-Fluoro-3-methylbenzoic acid MSDS Sheet

Literature and Reviews

  1. Improved loading and cleavage methods for solid-phase synthesis using chlorotrityl resins: synthesis and testing of a library of 144 discrete chemicals and potential farnesyltransferase inhibitors, J Park et al., J. Comb. Chem., 6 (3), 407–413 (2004); DOI: 10.1021/cc0340729.
  2. Enantiospecific synthesis of SB 214857, a potent, orally active nonpeptide fibrinogen receptor antagonist, W. Miller et al., Tetrahedron Lett., 36 (52), 9433–9436 (1995); DOI: 10.1016/0040-4039(95)02054-3.
  3. Structure-based design, synthesis and biological evaluation of highly selective and potent G protein-coupled receptor kinase 2 inhibitors, H. Waldschmidt et al., J. Med. Chem., 59 (8), 3793–3807 (2016); DOI: 10.1021/acs.jmedchem.5b02000.
  4. Synthesis and biological activity of imidazopyridine anticoccidial agents: part I, A. Scribner et al., Eur. J. Med. Chem., 42, 1334–1357 (2007); DOI: 10.1016/j.ejmech.2007.02.006.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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