Description

4-Methoxy-2-(Methoxymethyl)-5-Methylthieno[2,3-D]Pyrimidine-6-Carboxylic Acid is a high-purity, advanced pharmaceutical intermediate with a complex heterocyclic structure. This compound is critical for the synthesis of novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring targeted molecular design. It is primarily utilized by research institutions and pharmaceutical manufacturers engaged in the development of new chemical entities and specialty fine chemicals.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel drug candidates, especially in oncology and antiviral research.
• Organic Synthesis Research: Used in academic and industrial R&D for constructing complex thienopyrimidine scaffolds.
• Agrochemical Development: Serves as a precursor in the research and development of new-generation crop protection agents.
• Material Science: Investigated for potential applications in creating specialty polymers and advanced organic electronic materials.
• Contract Manufacturing (CMO): Supplied to custom synthesis organizations for the production of client-specific target molecules.

Basic Information

Product Name	4-Methoxy-2-(Methoxymethyl)-5-Methylthieno[2,3-D]Pyrimidine-6-Carboxylic Acid
CAS No.	923695-17-4
Molecular Formula	C12H14N2O4S
Molecular Weight	282.32 g/mol
Synonyms	5-Methyl-4-methoxy-2-(methoxymethyl)thieno[2,3-d]pyrimidine-6-carboxylic acid; Thieno[2,3-d]pyrimidine-6-carboxylic acid, 4-methoxy-2-(methoxymethyl)-5-methyl-; 923695-17-4; 4-Methoxy-2-methoxymethyl-5-methyl-thieno[2,3-d]pyrimidine-6-carboxylic acid
EINECS	Contact for details

Quality Control

Our production of 4-Methoxy-2-(Methoxymethyl)-5-Methylthieno[2,3-D]Pyrimidine-6-Carboxylic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is fully characterized and tested using advanced analytical techniques including HPLC, NMR, and mass spectrometry. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

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 hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm
Single Unknown Impurity (HPLC)	≤ 0.5%
Total Impurities (HPLC)	≤ 2.0%

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