Description

Thieno[2,3-D]Pyrimidine, 5-Methyl- (8Ci,9Ci) is a high-purity heterocyclic organic compound, specifically a fused thienopyrimidine derivative, serving as a critical building block in advanced chemical synthesis. Its value lies in its unique molecular scaffold, which is essential for constructing complex molecules with targeted biological or material properties. This intermediate is primarily needed by research institutions and pharmaceutical companies engaged in medicinal chemistry, agrochemical development, and materials science for creating novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key synthon for the research and development of new drug candidates, particularly in oncology, antiviral, and central nervous system (CNS) therapeutic areas.
• Agrochemical Synthesis: Used in the creation of novel pesticides, herbicides, and fungicides where the thienopyrimidine core contributes to biological activity.
• Material Science Research: Serves as a precursor for organic electronic materials, such as organic semiconductors or light-emitting diodes (OLEDs), due to its electron-rich heterocyclic structure.
• Chemical Biology Probes: Employed in the design and synthesis of molecular probes for studying enzyme function and biological pathways.
• Academic & Industrial R&D: A versatile starting material for synthetic organic chemists exploring new chemical reactions and constructing complex heterocyclic libraries.

Basic Information

Product Name	Thieno[2,3-D]Pyrimidine, 5-Methyl- (8Ci,9Ci)
CAS No.	19673-87-1
Molecular Formula	C7H6N2S
Molecular Weight	150.20 g/mol
Synonyms	5-Methylthieno[2,3-d]pyrimidine; 5-Methylthieno[2,3-d]pyrimidine; Thieno[2,3-d]pyrimidine, 5-methyl-; 5-Methyl-[1]benzothieno[2,3-d]pyrimidine; 5-Methylthieno(2,3-d)pyrimidine; 19673-87-1; 5-Methyl-thieno[2,3-d]pyrimidine; 5-Methylbenzo[4,5]thieno[2,3-d]pyrimidine
EINECS	Contact for details

Quality Control

Our Thieno[2,3-D]Pyrimidine, 5-Methyl- (8Ci,9Ci) is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and purity, and is supplied with a corresponding Certificate of Analysis (COA). We adhere to cGMP principles where applicable to support our clients in regulated research and development environments.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (typically 15-25°C). Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥97.0% (Area %)
Melting Point	Contact for details
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.