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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

2-(Chloromethyl)-4-methylquinazoline | CAS 109113-72-6

A quinazoline electrophile used to install the heteroarylmethyl substituent in published linagliptin chemistry, with the reactive chloromethyl group at C2 and a separate methyl group at C4.

CAS109113-72-6
Molecular formulaC10H9ClN2

Product overview

The chloromethyl group at quinazoline C2 is the electrophilic side chain of this building block; C4 bears a separate methyl group. This connectivity supplies the quinazolinylmethyl fragment in linagliptin assembly. Qualification should prioritize substituent positions, intact chloromethyl content and relevant quinazoline-related substances.

Chemical identity

Chemical name
2-(Chloromethyl)-4-methylquinazoline
CAS number
109113-72-6
Molecular formula
C10H9ClN2

Application context

Reported linagliptin assembly couples the C2-chloromethyl group with 8-bromo-7-(but-2-yn-1-yl)-3-methylxanthine, installing the quinazolinylmethyl substituent on xanthine nitrogen. For this substitution stage, confirm the C4 methyl position and intact electrophilic side chain. Assess separation of relevant quinazoline-related compounds, including the hydroxymethyl derivative when applicable to the selected process.

Chemistry and synthetic role

The fused quinazoline system contains two ring nitrogens, but the documented coupling occurs through its chloromethyl side chain. Nitrogen substitution on the xanthine incorporates the heteroarylmethyl unit. Distinguishing the C2 chloromethyl group from the C4 methyl group is part of identity review.

Quality review

Locate the chloromethyl substituent

Confirm the C2 side chain and C4 methyl position against a verified structure, rather than treating all chloromethylquinazolines as equivalent.

Assess the reactive-group profile

Where justified by the process, check method capability for the corresponding hydroxymethyl compound and other relevant related substances.

Specify the neutral compound

Specify the neutral chloromethyl compound and its assay basis. The chlorine is covalently attached to the side-chain carbon.

Preparing a specification

State CAS, the C2-chloromethyl/C4-methyl structure and the required assay or chromatographic method. Identify relevant quinazoline-related substances and any water or residual-solvent criteria justified by the intended substitution process.

Packaging and storage

Agree packaging, net weight and transport arrangements for the selected grade, quantity and destination. Confirm storage and handling conditions using the current SDS for the proposed material.

Documentation

Request structure-confirming data, the proposed assay and impurity methods, batch COA and current SDS. Confirm availability of chromatograms or information supporting the intact chloromethyl identity where needed for qualification.

Procurement questions

Is this a quinazoline hydrochloride?

No. The chlorine is covalently attached to the side-chain carbon.

What is introduced into the linagliptin route?

The documented reaction introduces the quinazolinylmethyl portion onto a xanthine nitrogen.

Which substituent positions should the RFQ specify?

Specify chloromethyl at quinazoline C2 and methyl at C4, with the CAS and a complete structure drawing.

Technical sources
  1. PubChem CID 241518: properties and CAS synonym crosscheckNCBI / PubChem
  2. 2-(Chloromethyl)-4-methylquinazoline — C2928Tokyo Chemical Industry
  3. CN112961155A: Preparation method of linagliptinPatent publication / Google Patents