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HONGKUN / PRODUCT DIRECTORY

2-Amino-4,6-dimethoxypyrimidine | CAS 36315-01-2

The dimethoxyaminopyrimidine fragment of published sulfonylurea-herbicide chemistry, supplying an exocyclic amino group for urea assembly while retaining the ring substitution pattern needed in the selected downstream structure.

CAS36315-01-2
Molecular formulaC6H9N3O2

Product overview

The amino group at pyrimidine C2 and methoxy groups at C4 and C6 give this free heterocyclic amine its role in sulfonylurea intermediate chemistry. The exocyclic NH2 participates in assembling the urea-containing connection, while the dimethoxypyrimidine ring forms the retained heterocyclic fragment. Its phenyl carbamate derivative, CAS 89392-03-0, represents a separate carbonyl-bearing stage. For this free amine, confirm complete methoxy substitution and identify any relevant hydroxy or chloro analogues. The receiving carbonyl-coupling step should guide the water and solvent criteria. A clear assay basis and a selective related-substances method help compare the amount of free amine available for the next reaction.

Chemical identity

Chemical name
2-Amino-4,6-dimethoxypyrimidine
CAS number
36315-01-2
Molecular formula
C6H9N3O2

Application context

Sulfonylurea synthesis uses the exocyclic amino group to assemble the urea connection, with this molecule supplying the dimethoxypyrimidine end. Specify the free amine when that is the receiving route’s starting form; the corresponding phenyl carbamate is a different carbonyl-activated stage. Confirm both methoxy groups and separation of relevant chloro, hydroxy or protected pyrimidines. Water and inorganic-residue criteria should reflect the carbonyl-coupling process.

Chemistry and synthetic role

The exocyclic NH2 group is the urea-forming functionality; the two ring nitrogens are part of the heteroaromatic framework. Converting NH2 into a phenyl carbamate adds a carbonyl activation unit and changes both molecular identity and procurement requirements.

Quality review

Confirm both methoxy groups

Use suitable identity and related-substances evidence to distinguish the dimethoxy ring from hydroxy or chloro analogues relevant to the manufacturing route.

Establish free-amine identity

Check that the requested material is not its phenyl carbamate or another protected derivative. These stages have different mass and reactive functionality.

Review water for the receiving step

Agree water determination and any solvent correction where they affect carbonyl reagents or charging. Limits should follow the actual downstream chemistry.

Preparing a specification

Specify the free 2-amino-4,6-dimethoxypyrimidine, assay and related-pyrimidine method. State water and inorganic-residue requirements when justified by the receiving urea assembly, without borrowing another supplier’s numerical grade.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, order quantity and destination. Request the applicable SDS and label to establish storage and handling conditions.

Documentation

Request structure confirmation and a chromatogram covering relevant pyrimidine impurities. Confirm availability of batch COA, SDS, water results and any method needed to distinguish the amine from carbonyl-protected derivatives.

Procurement questions

Is this the phenyl carbamate intermediate?

No. The free NH2 compound and its phenoxycarbonyl derivative have different identities and roles.

Which part of sulfonylurea chemistry does it supply?

It supplies the dimethoxypyrimidine amine fragment, not the sulfonyl partner.

Why review water rather than purity alone?

The receiving carbonyl-coupling chemistry may be affected by water; the acceptable limit is process-specific.

Technical sources
  1. J-CHECK: 4,6-dimethoxypyrimidin-2-amineNITE Japan
  2. 2-Amino-4,6-dimethoxypyrimidine A1165Tokyo Chemical Industry
  3. CAS 36315-01-2 catalogueSigma-Aldrich
  4. Preparation of 2-amino-4,6-dimethoxypyrimidineCN112552243A / Google Patents
  5. Preparation of sulfonylurea derivativesEuropean Patent Office EP0613896B1