Description

7-Ethyl-2-Methyl-4-Oxo-4,7-Dihydrothieno(2,3-B)Pyridine-5-Carboxylic Acid is a high-purity, advanced pharmaceutical intermediate with a complex fused-ring heterocyclic structure. This compound is valued for its role as a critical building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring sophisticated molecular scaffolds. It is primarily sought by research institutions and manufacturers in the pharmaceutical and fine chemical industries for drug discovery and development programs.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of complex drug candidates, especially those targeting central nervous system (CNS) disorders, inflammation, or metabolic diseases.
• Research & Development (R&D): Used in medicinal chemistry for structure-activity relationship (SAR) studies and the development of new chemical entities (NCEs).
• Organic Synthesis Building Block: Serves as a versatile scaffold for constructing more complex heterocyclic systems due to its reactive carboxylic acid and ketone functional groups.
• Reference Standard: Supplied as a high-purity standard for analytical method development, validation, and quality control in API manufacturing.
• Biochemical Research: Potential use in probing biological pathways or as a ligand in biochemical assays, given its unique thienopyridine core.

Basic Information

Product Name	7-Ethyl-2-Methyl-4-Oxo-4,7-Dihydrothieno(2,3-B)Pyridine-5-Carboxylic Acid
CAS No.	55503-20-3
Molecular Formula	C11H11NO3S
Molecular Weight	237.28 g/mol
Synonyms	7-Ethyl-2-methyl-4-oxo-4,7-dihydrothieno[2,3-b]pyridine-5-carboxylic acid; Thieno[2,3-b]pyridine-5-carboxylic acid, 4,7-dihydro-7-ethyl-2-methyl-4-oxo-; 7-Ethyl-2-methyl-4-oxo-4H,7H-thieno[2,3-b]pyran-5-carboxylic acid; 7-Ethyl-2-methyl-4-oxo-4,7-dihydrothieno[2,3-b]pyridine-5-carboxylic acid; 55503-20-3; 7-Ethyl-2-methyl-4-oxo-4,7-dihydrothieno(2,3-b)pyridine-5-carboxylic acid.
EINECS	Contact for details

Quality Control

Our production of 7-Ethyl-2-Methyl-4-Oxo-4,7-Dihydrothieno(2,3-B)Pyridine-5-Carboxylic Acid adheres to strict quality management protocols. Each batch is subjected to comprehensive analytical testing, including HPLC for purity, NMR and IR for structural confirmation, and residual solvent analysis. We provide a detailed Certificate of Analysis (COA) with every shipment, ensuring traceability and compliance with your internal specifications and cGMP guidelines where applicable.

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). The compound is compatible with strong acid/organic solvent environments but should be handled accordingly. Keep away from incompatible materials and sources of ignition.

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%
Related Substances (HPLC)	Any single impurity ≤ 0.5%; Total impurities ≤ 2.0%
Loss on Drying	≤ 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.