Description

3-Ethyl-2-Mercapto-6-Methyl-6,7-Dihydrothieno[3,2-D]Pyrimidin-4(3H)-One is a high-purity, advanced pharmaceutical intermediate with a complex heterocyclic structure. This compound matters for its role as a critical building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring sophisticated molecular architectures. It is primarily needed by R&D laboratories and production facilities in the pharmaceutical and fine chemical industries focused on developing new drug candidates.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly for central nervous system (CNS) and antiviral applications.
• Organic Synthesis Building Block: Used in research and development for constructing complex thienopyrimidine-based heterocycles.
• Agrochemical Research: Serves as a starting material for developing new active ingredients in crop protection products.
• Material Science: Investigated for potential use in organic electronic materials due to its fused ring system.
• Academic & Contract Research: Utilized in university and CRO settings for methodological studies and discovery chemistry.

Basic Information

Product Name	3-Ethyl-2-Mercapto-6-Methyl-6,7-Dihydrothieno[3,2-D]Pyrimidin-4(3H)-One
CAS No.	1105190-45-1
Molecular Formula	C10H12N2OS2
Molecular Weight	240.34 g/mol
Synonyms	3-Ethyl-2-mercapto-6-methyl-6,7-dihydro-4H-thieno[3,2-d]pyrimidin-4-one; 6,7-Dihydro-3-ethyl-2-mercapto-6-methylthieno[3,2-d]pyrimidin-4(3H)-one; 3-Ethyl-2-thioxo-6-methyl-2,3,6,7-tetrahydrothieno[3,2-d]pyrimidin-4(1H)-one; Thieno[3,2-d]pyrimidin-4(3H)-one, 6,7-dihydro-3-ethyl-2-mercapto-6-methyl-; CAS 1105190-45-1
EINECS	Contact for details

Quality Control

Our 3-Ethyl-2-Mercapto-6-Methyl-6,7-Dihydrothieno[3,2-D]Pyrimidin-4(3H)-One is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via NMR and MS, to ensure it meets the high standards required for pharmaceutical R&D. Certificates of Analysis (COA) with full traceability are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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