Description

4-Hydrazino-5-Methylthieno[2,3-D]Pyrimidine is a specialized heterocyclic building block of significant interest in advanced organic synthesis. Its core value lies in its functionalized pyrimidine-thiophene fused ring system, which serves as a critical precursor for constructing complex molecular architectures. This compound is primarily sought after by research chemists and process development scientists in the pharmaceutical and agrochemical industries for the development of novel active ingredients.

Application

• Pharmaceutical Intermediate: Key synthetic precursor for the development of kinase inhibitors, antiviral agents, and other small-molecule therapeutics targeting the thienopyrimidine pharmacophore.
• Agrochemical Research: Building block for creating novel fungicides, herbicides, and plant growth regulators that leverage its heterocyclic scaffold.
• Material Science Chemistry: Used in the synthesis of organic semiconductors, ligands for catalysis, and other functional materials due to its electron-rich structure.
• Chemical Biology & Proteomics: Serves as a versatile handle for bioconjugation and the development of chemical probes for target identification and validation studies.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for use in client-specific R&D and scale-up projects.

Basic Information

Product Name	4-Hydrazino-5-Methylthieno[2,3-D]Pyrimidine
CAS No.	19786-56-2
Molecular Formula	C7H8N4S
Molecular Weight	180.23 g/mol
Synonyms	5-Methyl-4-hydrazinylthieno[2,3-d]pyrimidine; 4-Hydrazinyl-5-methylthieno[2,3-d]pyrimidine; Thieno[2,3-d]pyrimidine, 4-hydrazino-5-methyl-; 5-Methylthieno[2,3-d]pyrimidin-4-ylhydrazine; 4-Hydrazino-5-methyl-thieno[2,3-d]pyrimidine
EINECS	Contact for details

Quality Control

Every batch of 4-Hydrazino-5-Methylthieno[2,3-D]Pyrimidine is produced and tested under a strict quality management system. We provide comprehensive analytical data to ensure the material meets the high-purity standards required for research and development. A detailed Certificate of Analysis (COA) including HPLC purity, identity confirmation (IR, NMR), and impurity profile is supplied with each shipment to guarantee reproducible results and supply chain integrity for your critical projects.

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 15-25°C. This compound is easily oxidized; prolonged exposure to air should be avoided. Keep container tightly sealed when not in use to maintain stability and purity.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%
Single Unknown Impurity (HPLC)	≤ 1.0%

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