Description

2-Methyl-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine-4-thiol is a high-purity, advanced heterocyclic building block and key synthetic intermediate. This compound is valued for its unique fused-ring structure, which is critical for imparting specific biological and electronic properties in target molecules. It is primarily sought by research and development teams in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients.

Application

• Pharmaceutical Intermediate: A crucial scaffold for the research and development of new drug candidates, particularly in kinase inhibitor and antiviral therapeutic areas.
• Agrochemical Synthesis: Serves as a key precursor in the design and production of novel herbicides, fungicides, and insecticides.
• Material Science Research: Used in the development of organic semiconductors and advanced functional materials due to its electron-rich thienopyrimidine core.
• Chemical Biology Probe: Employed as a building block for creating molecular probes to study enzyme function and biological pathways.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs and fine chemical manufacturers for bespoke synthesis projects requiring complex heterocyclic chemistry.

Basic Information

Product Name	2-Methyl-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine-4-thiol
CAS No.	307342-23-0
Molecular Formula	C10H10N2S2
Molecular Weight	222.33 g/mol
Synonyms	4-Thiol-2-methyl-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine; 2-Methyl-4-mercapto-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine; 4-Mercapto-2-methyl-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine; 307342-23-0; Thienopyrimidine thiol derivative; Cyclopentathienopyrimidine thiol
EINECS	Contact for details

Quality Control

Our production of 2-Methyl-6,7-dihydro-5H-cyclopenta[4,5]thieno[2,3-d]pyrimidine-4-thiol adheres to stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and NMR/LC-MS for structural confirmation, to ensure consistency and reliability for your critical R&D and scale-up processes. Certificates of Analysis (COA) are provided with each shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry place at a controlled room temperature (15-25°C). This material is easily oxidized; prolonged exposure to air should be avoided.

Specification

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