Description

2,4-Dichloro-5,6-Dimethylthieno[2,3-D]Pyrimidine is a high-value heterocyclic building block and key synthetic intermediate in advanced organic chemistry. This compound matters for its role in constructing complex molecular architectures, particularly in the development of novel active pharmaceutical ingredients (APIs) and agrochemicals. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and specialty chemical industries seeking to introduce the unique thienopyrimidine scaffold into their target molecules.

Application

• Pharmaceutical Intermediate: Serves as a critical precursor in the synthesis of potential drug candidates, especially kinase inhibitors and other small molecule therapeutics.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging the bioactivity of the thienopyrimidine core.
• Material Science: Acts as a building block for organic electronic materials, such as organic semiconductors and light-emitting diodes (OLEDs).
• Dye & Pigment Synthesis: Employed in the creation of specialized heterocyclic dyes and functional pigments.
• Academic & Contract Research: Essential for methodological studies and novel synthetic route exploration in university and CRO laboratories.
• Custom Synthesis: A starting material for the contract manufacturing of complex, customer-specific organic molecules.

Basic Information

Product Name	2,4-Dichloro-5,6-Dimethylthieno[2,3-D]Pyrimidine
CAS No.	42518-42-3
Molecular Formula	C8H6Cl2N2S
Molecular Weight	233.12 g/mol
Synonyms	2,4-Dichloro-5,6-dimethylthieno[2,3-d]pyrimidine; 5,6-Dimethyl-2,4-dichlorothieno[2,3-d]pyrimidine; Thieno[2,3-d]pyrimidine, 2,4-dichloro-5,6-dimethyl-; 2,4-Dichloro-5,6-dimethylthienopyrimidine; 42518-42-3; AKOS005258529; FT-0653837; EN300-125078; SCHEMBL11827527; DTXSID60674469
EINECS	Contact for details

Quality Control

Our 2,4-Dichloro-5,6-Dimethylthieno[2,3-D]Pyrimidine is produced under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and GC-MS, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided and available upon request, supporting your quality assurance and regulatory compliance 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). Keep away from heat, sparks, and open flame. For long-term storage, consider storing under an inert atmosphere.

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%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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