Description

5-Methyl-4-Oxo-4,5-Dihydroisoxazolo[5,4-D]Pyrimidine-3-Carboxylic Acid (Saltdata: Free) is a high-purity, advanced pharmaceutical intermediate with a complex fused heterocyclic structure. This compound is valued for its role as a critical building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring sophisticated molecular scaffolds. It is primarily sought by research institutions and manufacturers in the pharmaceutical and biotechnology sectors engaged in drug discovery and development programs.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of complex drug candidates, especially those targeting kinase inhibition or other enzyme-related pathways.
• Medicinal Chemistry Research: Serves as a versatile scaffold for constructing novel chemical libraries for high-throughput screening and structure-activity relationship (SAR) studies.
• API Development: Used in the research and process development stages for creating new Active Pharmaceutical Ingredients with potential antiviral or anticancer activity.
• Bioconjugation & Probe Synthesis: The carboxylic acid functionality allows for derivatization, making it useful for creating labeled probes or conjugates for biochemical assays.
• Contract Research & Manufacturing (CRO/CMO): Supplied to organizations specializing in custom synthesis and scale-up services for the pharmaceutical industry.

Basic Information

Product Name	5-Methyl-4-Oxo-4,5-Dihydroisoxazolo[5,4-D]Pyrimidine-3-Carboxylic Acid (Saltdata: Free)
CAS No.	1104927-34-5
Molecular Formula	C8H5N3O4
Molecular Weight	207.14 g/mol
Synonyms	5-Methyl-4-oxo-4,5-dihydro-[1,2]oxazolo[5,4-d]pyrimidine-3-carboxylic acid; 4,5-Dihydro-5-methyl-4-oxo[1,2]oxazolo[5,4-d]pyrimidine-3-carboxylic acid; Isoxazolo[5,4-d]pyrimidine-3-carboxylic acid, 4,5-dihydro-5-methyl-4-oxo-; CAS 1104927-34-5; 5-Methyl-4-oxo-4H-isoxazolo[5,4-d]pyrimidine-3-carboxylic acid
EINECS	Contact for details

Quality Control

Our production of 5-Methyl-4-Oxo-4,5-Dihydroisoxazolo[5,4-D]Pyrimidine-3-Carboxylic Acid adheres to stringent quality protocols suitable for pharmaceutical R&D applications. Each batch is characterized and tested using advanced analytical techniques including HPLC, NMR, and MS to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided to support your quality and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed in a dry environment to prevent degradation. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.