Description

2,5-Dimethyl-4-Oxo-3,4-Dihydrothieno[2,3-D]Pyrimidine-6-Carboxylic Acid (Saltdata: Free) is a high-purity, advanced pharmaceutical intermediate with a complex heterocyclic structure. This compound is critical for the synthesis of novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring targeted molecular scaffolds. It is primarily utilized by research institutions and pharmaceutical manufacturers engaged in the development of new drug candidates.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the synthesis of novel drug candidates, particularly for central nervous system (CNS) and antiviral applications.
• Organic Synthesis Research: Used in academic and industrial R&D for constructing complex thienopyrimidine-based molecular libraries.
• Agrochemical Development: Acts as a precursor in the research and development of new crop protection agents and herbicides.
• Material Science Research: Investigated for potential use in the development of organic electronic materials due to its fused heterocyclic system.

Basic Information

Product Name	2,5-Dimethyl-4-Oxo-3,4-Dihydrothieno[2,3-D]Pyrimidine-6-Carboxylic Acid (Saltdata: Free)
CAS No.	146628-89-9
Molecular Formula	C9H8N2O3S
Molecular Weight	224.24 g/mol
Synonyms	2,5-Dimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid; Thieno[2,3-d]pyrimidine-6-carboxylic acid, 3,4-dihydro-2,5-dimethyl-4-oxo-; 146628-89-9; 2,5-Dimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid (free acid); 6-Carboxy-2,5-dimethyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine
EINECS	Contact for details

Quality Control

Our production of 2,5-Dimethyl-4-Oxo-3,4-Dihydrothieno[2,3-D]Pyrimidine-6-Carboxylic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced chromatographic and spectroscopic techniques. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). The product is moisture-sensitive (hygroscopic); keep the container tightly sealed in a dry environment.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
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.