Description

4-Chloro-6-Methylthieno[2,3-D]Pyrimidine is a high-purity heterocyclic building block of significant interest in advanced organic synthesis. This compound serves as a critical intermediate for the development of novel pharmaceutical agents and agrochemicals, where its unique fused-ring structure enables the creation of complex molecular architectures. It is primarily sought after by research institutions and industrial R&D departments focused on medicinal chemistry, crop protection, and material science.

Application

• Pharmaceutical Intermediate: A key synthon for the synthesis of potential kinase inhibitors, anticancer agents, and other biologically active small molecules.
• Agrochemical Research: Used in developing new classes of herbicides, fungicides, and plant growth regulators.
• Material Science Precursor: Serves as a building block for organic electronic materials, such as semiconductors and light-emitting compounds.
• Chemical Biology Probe: Utilized in the design and synthesis of molecular probes for studying enzyme function and cellular pathways.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs and fine chemical companies for client-specific synthesis projects.
• Academic & Industrial R&D: Fundamental research reagent for exploring new heterocyclic chemistry and reaction methodologies.

Basic Information

Item	Detail
Product Name	4-Chloro-6-Methylthieno[2,3-D]Pyrimidine
CAS No.	106691-21-8
Molecular Formula	C7H5ClN2S
Molecular Weight	184.65 g/mol
Synonyms	4-Chloro-6-methylthieno[2,3-d]pyrimidine; 6-Methyl-4-chlorothieno[2,3-d]pyrimidine; Thieno[2,3-d]pyrimidine, 4-chloro-6-methyl-; 4-Chloro-6-methylthieno[2,3-d]pyrimidine; 106691-21-8; 4-Chloro-6-methyl-thieno[2,3-d]pyrimidine; 4-Chloro-6-methyl-thieno[2,3-d]pyrimidine
EINECS	Contact for details

Quality Control

Every batch of 4-Chloro-6-Methylthieno[2,3-D]Pyrimidine is manufactured and tested under a strict quality management system. We ensure compliance with relevant industry standards for research-grade and intermediate chemicals. Comprehensive analytical testing, including HPLC, GC, and NMR, is performed to verify identity, purity, and consistency. A Certificate of Analysis (COA) detailing all test results is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to exclude moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (HPLC/IR)	Conforms to reference standard
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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