Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

5-Amino-4,6-dichloro-2-methylpyrimidine | CAS 39906-04-2

An aminopyrimidine with a free C5 amino group, C2 methyl and two chlorinated ring positions, supporting moxonidine-related chemistry and published purine routes. Qualification centres on the correct amino and chloride substitution stage.

CAS39906-04-2
Molecular formulaC5H5Cl2N3
Molecular weight178.02 g/mol

Product overview

Three features define this building block: the exocyclic amino group at C5, the methyl group at C2 and chlorides at C4 and C6. The amino function is already present, distinguishing the material from a nitropyrimidine precursor. It provides a site for nitrogen functionalisation while the chlorinated carbons allow further ring substitution. Published routes use this combination in moxonidine-related intermediates and in purine development. For procurement, confirm the free amino form and the complete substitution pattern, then agree a chromatographic method for relevant precursor and substituted-pyrimidine components. Assay and related-substance requirements should follow the actual route stage for which the sample will be qualified.

Chemical identity

Chemical name
5-Amino-4,6-dichloro-2-methylpyrimidine
CAS number
39906-04-2
Molecular formula
C5H5Cl2N3
Molecular weight
178.02 g/mol

Application context

Moxonidine-related patent chemistry uses this aminopyrimidine to construct an imidazoline-associated amino substituent before subsequent pyrimidine modification. The C2 methyl and the ring substitution pattern form part of the retained molecular framework.

Other published routes use the same starting material in amination sequences leading towards substituted purines. These applications involve different treatment of the free amino group and the remaining chlorides. State the intended transformation and identify which precursor or partially substituted pyrimidines need to be resolved during incoming-material analysis.

Chemistry and synthetic role

The free C5 amino group provides an N-functionalisation site. The C4/C6 chlorides supply separate electrophilic positions, while the C2 methyl is part of the carbon skeleton.

Quality review

Verify the free C5 amino group

Distinguish the amine from nitro, protected or previously derivatised material.

Confirm all ring positions

Identify the C2 methyl and C4/C6 chlorides together rather than relying on an abbreviated name.

Resolve relevant pyrimidine derivatives

Agree chromatographic control of route-related precursors and substituted components.

Preparing a specification

Specify CAS 39906-04-2 with free C5 amino identity, C2 methyl and intact C4/C6 chlorides. Include assay method and limits for relevant precursor or substituted pyrimidines.

Packaging and storage

Packaging, closure and net weight are agreed for the selected grade, order quantity and destination. Confirm storage and transport requirements against the actual supplier SDS.

Documentation

Request a batch COA, specification, identity data and SDS. Confirm the availability of the analytical methods and any application-specific impurity results with the proposed supplier.

Procurement questions

Does this material still need nitro reduction?

The specified structure already contains a free amino group at C5.

Which routes use this substitution pattern?

Published applications include moxonidine-related intermediates and purine-compound research.

Why identify partially substituted pyrimidines?

They represent different starting functionality and may affect the next planned transformation.

Technical sources
  1. 5-Amino-4,6-dichloro-2-methylpyrimidine A1946TCI
  2. 4,6-Dichloro-2-methylpyrimidin-5-amine SDSIndagoo Research Chemicals
  3. Moxonidine analogs, preparation processes and uses thereforWO2008073125A1
  4. Purine compoundsWO2010080306A1