Description

2-Methylthieno[2,3-D]Pyrimidin-4(3H)-One is a high-purity heterocyclic organic compound that serves as a critical advanced intermediate in modern chemical synthesis. Its unique fused thienopyrimidine structure makes it a valuable building block for the development of novel active pharmaceutical ingredients (APIs) and functional materials. This compound is essential for research and production in the pharmaceutical, agrochemical, and specialty chemical industries, where precise molecular architecture is required.

Application

• Pharmaceutical Intermediate: A key synthon for the research and development of new drug candidates, particularly in therapeutic areas requiring complex heterocyclic cores.
• Agrochemical Synthesis: Used in the production of advanced pesticides and herbicides, leveraging its structural properties to enhance efficacy and selectivity.
• Material Science Research: Serves as a precursor for organic electronic materials, such as semiconductors or light-emitting components, due to its conjugated system.
• Chemical Research & Development: Employed as a versatile scaffold in medicinal chemistry for structure-activity relationship (SAR) studies and library synthesis.
• Fine Chemical Production: Acts as a building block for synthesizing complex molecules used in dyes, pigments, and other specialty chemicals.

Basic Information

Product Name	2-Methylthieno[2,3-D]Pyrimidin-4(3H)-One
CAS No.	21582-51-4
Molecular Formula	C7H6N2OS
Molecular Weight	166.20 g/mol
Synonyms	2-Methyl-3H-thieno[2,3-d]pyrimidin-4-one; 2-Methylthieno[2,3-d]pyrimidin-4(3H)-one; 4(3H)-Thieno[2,3-d]pyrimidinone, 2-methyl-; 2-Methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine; 2-Methyl-4H-thieno[2,3-d]pyrimidin-4-one; 2-Methylthieno[2,3-d]pyrimidin-4-ol; 21582-51-4
EINECS	Contact for details

Quality Control

Our 2-Methylthieno[2,3-D]Pyrimidin-4(3H)-One is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and related substances, to meet the stringent requirements of our global clientele. Certificates of Analysis (COA) detailing all specifications are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials. For long-term storage, consider storing under an inert atmosphere to maintain product integrity.

Specification

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