Description

4-Chloro-2-(Methylthio)Thieno[2,3-D]Pyrimidine is a high-value heterocyclic building block and key synthetic intermediate in advanced organic chemistry. Its unique fused-ring structure containing sulfur and nitrogen atoms makes it indispensable for constructing complex molecular architectures. This compound is primarily sought after by research and development teams in the pharmaceutical and agrochemical sectors for the synthesis of novel active ingredients.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of kinase inhibitors, antiviral agents, and other small-molecule drug candidates targeting various therapeutic areas.
• Agrochemical Research: Serves as a core scaffold for developing new generations of herbicides, fungicides, and insecticides with improved efficacy and selectivity.
• Material Science: Used in the research and development of organic electronic materials, such as semiconductors and light-emitting components, due to its electron-rich thienopyrimidine core.
• Chemical Synthesis: Acts as a versatile building block for further functionalization, enabling the creation of diverse chemical libraries for high-throughput screening in drug discovery.
• Academic & Contract Research: Essential for methodological studies and synthetic route development in university laboratories and contract research organizations (CROs).

Basic Information

Item	Detail
Product Name	4-Chloro-2-(Methylthio)Thieno[2,3-D]Pyrimidine
CAS No.	598298-10-3
Molecular Formula	C7H5ClN2S2
Molecular Weight	216.71 g/mol
Synonyms	4-Chloro-2-(methylsulfanyl)thieno[2,3-d]pyrimidine; 2-(Methylthio)-4-chlorothieno[2,3-d]pyrimidine; 4-Chloro-2-methylmercaptothieno[2,3-d]pyrimidine; Thieno[2,3-d]pyrimidine, 4-chloro-2-(methylthio)-; 598298-10-3; 4-Chloro-2-methylsulfanyl-thieno[2,3-d]pyrimidine
EINECS	Contact for details

Quality Control

We maintain a rigorous quality management system to ensure batch-to-batch consistency and high purity for research and development applications. Our standard pharmaceutical intermediate grade is characterized by multiple analytical techniques including HPLC, NMR, and MS. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your regulatory and R&D documentation needs.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from 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%

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