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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-Fluorophenyl isothiocyanate | CAS 38985-64-7

An ortho-fluorinated aryl isothiocyanate used to build acylthiosemicarbazide intermediates, transferring a defined fluorophenyl–nitrogen fragment into sulfur-containing heterocycle research.

CAS38985-64-7
Molecular formulaC7H4FNS
Molecular weight153.18 g/mol

Product overview

The adjacent fluorine and isothiocyanate substituents define this aromatic building block. Its reactive group is N=C=S, not the oxygen-containing N=C=O group of an isocyanate, and it is attached to the ring through nitrogen. These distinctions govern the sulfur-containing products available from nucleophilic addition. When sourcing the material, establish the ortho substitution pattern and the integrity of the isothiocyanate functionality together. Chemical assay and related organic components should be evaluated with a method that separates fluorophenyl positional isomers or residual amine where relevant.

Chemical identity

Chemical name
2-Fluorophenyl isothiocyanate
CAS number
38985-64-7
Molecular formula
C7H4FNS
Molecular weight
153.18 g/mol

Application context

Research on diphenylsulfone-containing heterocycles uses 2-fluorophenyl isothiocyanate with acyl hydrazides to form acylthiosemicarbazides. Subsequent cyclization gives 1,2,4-triazole-thione or 1,3,4-thiadiazole derivatives while retaining the fluorophenyl fragment. The reagent therefore provides a sulfur-containing linkage precursor and a specific aryl substituent in this published sequence. For a comparable development route, a buyer should connect impurity controls to possible alternative thiourea-type products, especially those arising from positional-isomer contamination or an altered isothiocyanate composition.

Chemistry and synthetic role

The structure is ortho-F–C6H4–N=C=S. Nucleophilic addition at the NCS carbon underlies its acylthiosemicarbazide-forming role.

Quality review

Verify ortho fluorine

Confirm the 2-fluorophenyl isomer by a suitable identity method.

Identify NCS rather than NCO

Use structure-sensitive data to confirm the sulfur-containing function.

Review amine and related species

Set route-relevant controls for residual fluorinated amines and related isothiocyanates.

Preparing a specification

Specify ortho identity, intact isothiocyanate assay, analytical method and relevant fluorinated amine or positional-isomer 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

Are the 3- and 4-fluoro isomers equivalent?

They install different aryl substitution patterns in the product.

Is this a fluorophenyl isocyanate?

No, the reactive group contains sulfur rather than oxygen.

Why assess residual amine?

An amine can react with the isothiocyanate and change the reagent or downstream impurity profile.

Technical sources
  1. PubChem CID 97520NCBI / PubChem
  2. 2-Fluorophenyl isothiocyanateSigma-Aldrich
  3. New Heterocyclic Compounds from 1,2,4-triazole and 1,3,4-thiadiazole Class Having Diphenylsulfone and 2-fluorophenyl FragmentsBarbuceanu et al. / Revista de Chimie