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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

4,6-Dichloro-5-nitropyrimidine | CAS 4316-93-2

An electron-deficient pyrimidine electrophile used in published solid-phase purine synthesis. Two chlorides support sequential amine substitution, and the C5 nitro group provides a route to the amino functionality needed for ring construction.

CAS4316-93-2
Molecular formulaC4HCl2N3O2

Product overview

Two symmetry-related chlorides flank the nitro-bearing carbon in 4,6-dichloro-5-nitropyrimidine. This arrangement enables controlled elaboration of the pyrimidine before construction of a fused purine ring. It is a distinct starting material from the 2,4-dichloro positional isomer, even though both can appear in purine research. For a purchasing team, the exact ring substitution pattern is therefore as important as the reported assay. Qualification should establish identity and a chromatographic profile that separates relevant substituted or hydrolysed components. Where the material will be attached to a solid support, sample dissolution and insoluble residue can also be discussed against the actual loading solvent.

Chemical identity

Chemical name
4,6-Dichloro-5-nitropyrimidine
CAS number
4316-93-2
Molecular formula
C4HCl2N3O2

Application context

Published solid-phase approaches attach 4,6-dichloro-5-nitropyrimidine to an amine-bearing resin and replace the remaining chloride with another amine. Conversion of the nitro group to an amino group then enables further construction of substituted purines. Related work uses polymer-supported amino acids to introduce an amino-acid motif into the resulting purine derivatives.

These applications place the compound at the electrophilic building-block stage of a research route. A qualification sample should be assessed for the intended first substitution and subsequent diversification. Identity, chromatographic resolution of related pyrimidines and solution suitability are useful starting points when agreeing the reagent specification.

Chemistry and synthetic role

The two pyrimidine nitrogens and nitro substituent create an electron-poor ring. Amine substitution at the chlorinated positions and conversion of the nitro group provide complementary steps towards fused-ring assembly.

Quality review

Separate positional isomers

Confirm the 4,6-dichloro arrangement against the structurally different 2,4 isomer.

Review substitution-related components

Agree an HPLC separation for relevant chlorinated, substituted or hydrolysed pyrimidines.

Define suitability for solid-phase loading

Where resin loading is intended, state the solvent and any water or insoluble-residue requirements.

Preparing a specification

Specify the 4,6-dichloro isomer, identity method, HPLC assay and relevant pyrimidine impurities. Include solvent-specific dissolution and water criteria when these affect the planned resin or solution process.

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

Is the 2,4-dichloro isomer interchangeable?

No. Its substitution pattern differs and the synthetic sequence must match the selected structure.

Why is the nitro group important for purine synthesis?

Its conversion to an amino group supplies functionality used in subsequent fused-ring construction.

What should be specified for resin chemistry?

The exact electrophile, chromatographic acceptance criteria and any dissolution or moisture requirements for the loading system.

Technical sources
  1. 4,6-Dichloro-5-nitropyrimidine D69300Sigma-Aldrich
  2. 4,6-Dichloro-5-nitropyrimidineAK Scientific
  3. Solid phase synthesis of purines from pyrimidinesPubMed / Journal of Combinatorial Chemistry
  4. Synthesis of Novel N9-Substituted Purine Derivatives from Polymer Supported α-Amino AcidsPubMed / ACS Combinatorial Science