Description

3,5-Dimethyl-4-Oxo-3,4-Dihydrothieno[2,3-D]Pyrimidine-6-Carboxylic Acid is a high-value heterocyclic building block and advanced pharmaceutical intermediate. This compound matters for its critical role in the synthesis of complex molecules, particularly in medicinal chemistry where it serves as a key precursor for drug discovery programs. It is primarily needed by research institutions and pharmaceutical companies developing novel therapeutic agents, especially in areas like kinase inhibitors and other small-molecule drugs.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for kinase inhibitor candidates.
• Medicinal Chemistry Research: Used in lead optimization and structure-activity relationship (SAR) studies for novel drug discovery.
• Organic Synthesis: Serves as a versatile scaffold for constructing complex fused heterocyclic systems in academic and industrial R&D.
• Biochemical Tool Compound: Potential use in developing probes for studying biological pathways and enzyme functions.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for custom synthesis projects.

Basic Information

Product Name	3,5-Dimethyl-4-Oxo-3,4-Dihydrothieno[2,3-D]Pyrimidine-6-Carboxylic Acid
CAS No.	439138-78-0
Molecular Formula	C9H8N2O3S
Molecular Weight	224.24 g/mol
Synonyms	Thieno[2,3-d]pyrimidine-6-carboxylic acid, 3,4-dihydro-3,5-dimethyl-4-oxo-; 3,5-Dimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid; 439138-78-0; 6-Carboxy-3,5-dimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine; 3,5-Dimethyl-4-oxo-4H-thieno[2,3-d]pyrimidine-6-carboxylic acid
EINECS	Contact for details

Quality Control

Our 3,5-Dimethyl-4-Oxo-3,4-Dihydrothieno[2,3-D]Pyrimidine-6-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets the high standards required for pharmaceutical research. Certificates of Analysis (COA) with detailed chromatographic data are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents and strong bases. For long-term storage, consider storing under an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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