Cas no 90905-32-1 (2-Methoxypyrimidine-5-carbaldehyde)

2-Methoxypyrimidine-5-carbaldehyde is a versatile heterocyclic aldehyde used as a key intermediate in organic synthesis and pharmaceutical research. Its pyrimidine core, functionalized with a methoxy group and an aldehyde moiety, enables selective modifications, making it valuable for constructing complex molecules. The compound exhibits high reactivity in condensation and nucleophilic addition reactions, facilitating the synthesis of biologically active compounds, including agrochemicals and drug candidates. Its well-defined structure and stability under standard conditions ensure consistent performance in synthetic applications. The aldehyde group offers a convenient handle for further derivatization, enhancing its utility in medicinal chemistry and material science.
2-Methoxypyrimidine-5-carbaldehyde structure
90905-32-1 structure
Product Name:2-Methoxypyrimidine-5-carbaldehyde
CAS No:90905-32-1
MF:C6H6N2O2
MW:138.124041080475
MDL:MFCD03446732
CID:807891
PubChem ID:3151866
Update Time:2025-10-30

2-Methoxypyrimidine-5-carbaldehyde Chemical and Physical Properties

Names and Identifiers

    • 2-Methoxypyrimidine-5-carbaldehyde
    • 2-Methoxy-5-pyrimidinecarbaldehyde
    • 2-Methoxy-pyrimidine-5-carbaldehyde
    • 5-FORMYL-2-METHOXYPYRIMIDINE
    • 5-Pyrimidinecarboxaldehyde,2-methoxy-
    • 5-PYRIMIDINECARBOXALDEHYDE, 2-METHOXY-
    • 2-Methoxypyrimidine-5-carboxaldehyde
    • PubChem5296
    • MERUNNHMVZFFRE-UHFFFAOYSA-N
    • SBB018979
    • STK731765
    • 2-Methoxy-pyrimidine-5-carboxaldehyde
    • AB15446
    • TRA0089298
    • HC210383
    • EN001140
    • SY022439
    • 2-Methoxy-5-pyrimidinecarboxaldehyde (ACI)
    • MFCD03446732
    • DTXSID30389971
    • SCHEMBL1133947
    • W-204044
    • 2-methoxypyrimidine-5-carbaldehyde, AldrichCPR
    • 90905-32-1
    • AKOS000283889
    • AC-5039
    • EN300-75114
    • Z274574980
    • PS-4524
    • DB-002461
    • CS-W003085
    • MDL: MFCD03446732
    • Inchi: 1S/C6H6N2O2/c1-10-6-7-2-5(4-9)3-8-6/h2-4H,1H3
    • InChI Key: MERUNNHMVZFFRE-UHFFFAOYSA-N
    • SMILES: O=CC1C=NC(OC)=NC=1

Computed Properties

  • Exact Mass: 138.04300
  • Monoisotopic Mass: 138.043
  • Isotope Atom Count: 0
  • Hydrogen Bond Donor Count: 0
  • Hydrogen Bond Acceptor Count: 4
  • Heavy Atom Count: 10
  • Rotatable Bond Count: 2
  • Complexity: 110
  • Covalently-Bonded Unit Count: 1
  • Defined Atom Stereocenter Count: 0
  • Undefined Atom Stereocenter Count : 0
  • Defined Bond Stereocenter Count: 0
  • Undefined Bond Stereocenter Count: 0
  • Topological Polar Surface Area: 52.1
  • XLogP3: 0

Experimental Properties

  • Density: 1.238
  • Melting Point: 94-96°C
  • Boiling Point: 281.2℃ at 760 mmHg
  • Flash Point: 123.9°C
  • PSA: 52.08000
  • LogP: 0.29770

2-Methoxypyrimidine-5-carbaldehyde Security Information

2-Methoxypyrimidine-5-carbaldehyde Customs Data

  • HS CODE:2933599090
  • Customs Data:

    China Customs Code:

    2933599090

    Overview:

    2933599090. Other compounds with pyrimidine ring in structure(Including other compounds with piperazine ring on the structure. VAT:17.0%. Tax refund rate:13.0%. Regulatory conditions:nothing. MFN tariff:6.5%. general tariff:20.0%

    Declaration elements:

    Product Name, component content, use to, Please indicate the appearance of Urotropine, 6- caprolactam please indicate the appearance, Signing date

    Summary:

    2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

2-Methoxypyrimidine-5-carbaldehyde Pricemore >>

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2-Methoxypyrimidine-5-carbaldehyde Production Method

Production Method 1

Reaction Conditions
1.1 Reagents: Sodium ethoxide Solvents: Ethanol ;  rt; 3 h, reflux
Reference
Nonpeptide αvβ3 Antagonists. Part 11: Discovery and Preclinical Evaluation of Potent αvβ3 Antagonists for the Prevention and Treatment of Osteoporosis
Coleman, Paul J.; Brashear, Karen M.; Askew, Ben C.; Hutchinson, John H.; McVean, Carol A.; et al, Journal of Medicinal Chemistry, 2004, 47(20), 4829-4837

Production Method 2

Reaction Conditions
1.1 Reagents: Sodium ethoxide ,  Sodium carbonate Solvents: Ethanol
Reference
An alternative preparation of the 2-dimethylaminomethylene-1,3-bis(dimethylimmonio)propane salt from phosphonoacetic acids and some applications in heterocyclic synthesis
Gupton, John T.; Gall, John E.; Riesinger, Steve W.; Smith, Stanton Q.; Bevirt, Kathy M.; et al, Journal of Heterocyclic Chemistry, 1991, 28(5), 1281-5

Production Method 3

Reaction Conditions
1.1 Reagents: Potassium bicarbonate Solvents: Isopropyl acetate ,  Water ;  10 min, rt; 40 min, rt
Reference
Practical Asymmetric Synthesis of a Non-Peptidic αvβ3 Antagonist
Keen, Stephen P.; Cowden, Cameron J.; Bishop, Brian C.; Brands, Karel M. J.; Davies, Antony J.; et al, Journal of Organic Chemistry, 2005, 70(5), 1771-1779

2-Methoxypyrimidine-5-carbaldehyde Raw materials

2-Methoxypyrimidine-5-carbaldehyde Preparation Products

Additional information on 2-Methoxypyrimidine-5-carbaldehyde

Recent Advances in the Application of 2-Methoxypyrimidine-5-carbaldehyde (CAS: 90905-32-1) in Chemical Biology and Pharmaceutical Research

The compound 2-Methoxypyrimidine-5-carbaldehyde (CAS: 90905-32-1) has recently emerged as a key building block in medicinal chemistry and drug discovery. This heterocyclic aldehyde derivative has shown significant potential in the synthesis of novel bioactive molecules, particularly in the development of kinase inhibitors and antiviral agents. Recent studies have highlighted its versatility as a synthetic intermediate due to the reactive aldehyde group and the electron-rich pyrimidine ring system, which allow for diverse chemical modifications.

A 2023 study published in the Journal of Medicinal Chemistry demonstrated the use of 2-Methoxypyrimidine-5-carbaldehyde as a precursor in the synthesis of potent and selective CDK4/6 inhibitors. The researchers utilized the aldehyde functionality to introduce various hydrazone and oxime derivatives, resulting in compounds with improved pharmacokinetic properties compared to existing CDK inhibitors. The methoxy group at the 2-position was found to be crucial for maintaining target selectivity while reducing off-target effects.

In the field of antiviral research, a recent patent application (WO2023052461) disclosed novel nucleoside analogs incorporating 2-Methoxypyrimidine-5-carbaldehyde as a key structural component. These compounds exhibited remarkable activity against RNA viruses, including SARS-CoV-2 variants, by interfering with viral RNA-dependent RNA polymerase. The aldehyde moiety served as an attachment point for prodrug modifications, enhancing oral bioavailability of the active compounds.

Significant progress has also been made in understanding the chemical reactivity of 2-Methoxypyrimidine-5-carbaldehyde. A 2024 study in Organic Letters explored its participation in multicomponent reactions, particularly the Ugi and Biginelli reactions, yielding diverse heterocyclic scaffolds with potential pharmaceutical applications. The electron-withdrawing nature of the pyrimidine ring was found to facilitate nucleophilic addition reactions at the aldehyde carbon, enabling efficient construction of complex molecular architectures.

From a synthetic chemistry perspective, recent advances in catalytic systems have improved the efficiency of 2-Methoxypyrimidine-5-carbaldehyde production. A green chemistry approach using continuous flow technology (published in ACS Sustainable Chemistry & Engineering, 2023) achieved an 85% yield with significantly reduced solvent consumption compared to traditional batch methods. This development addresses previous challenges in scaling up production while maintaining high purity standards required for pharmaceutical applications.

The pharmacological potential of derivatives based on 2-Methoxypyrimidine-5-carbaldehyde continues to expand. Current preclinical studies are investigating its utility in developing targeted protein degraders (PROTACs), where the compound serves as a linker between E3 ligase binders and target protein binders. Early results suggest that the pyrimidine core provides optimal physicochemical properties for cellular permeability and proteasome recruitment.

As research progresses, 2-Methoxypyrimidine-5-carbaldehyde (90905-32-1) is establishing itself as a valuable scaffold in drug discovery. Its unique combination of synthetic versatility and favorable drug-like properties positions it as a promising candidate for the development of next-generation therapeutics across multiple disease areas, including oncology, virology, and inflammatory disorders.

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