Description

7-Ethyl-4,7-Dihydro-4-Oxo-Thieno[2,3-B]-Pyridine-5-Carboxylic Acid is a high-purity heterocyclic organic compound, serving as a critical advanced pharmaceutical intermediate (API intermediate) for the synthesis of novel therapeutic agents. Its value lies in its precise molecular structure, which is essential for constructing complex molecules with targeted biological activity in modern drug discovery. This product is primarily required by research institutions, pharmaceutical R&D laboratories, and fine chemical manufacturers engaged in developing new active pharmaceutical ingredients (APIs), particularly in areas like kinase inhibitors or other small-molecule therapeutics.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel active pharmaceutical ingredients (APIs), especially for targeted therapies.
• Research & Development: Used in medicinal chemistry for structure-activity relationship (SAR) studies and the development of new drug candidates.
• Organic Synthesis: Serves as a versatile precursor for constructing complex heterocyclic frameworks in fine chemical manufacturing.
• Biochemical Research: Potential use as a probe or inhibitor in biochemical assays to study specific enzymatic pathways.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for custom synthesis projects.

Basic Information

Product Name	7-Ethyl-4,7-Dihydro-4-Oxo-Thieno[2,3-B]-Pyridine-5-Carboxylic Acid
CAS No.	55503-33-8
Molecular Formula	C11H11NO3S
Molecular Weight	237.28 g/mol
Synonyms	7-Ethyl-4,7-dihydro-4-oxothieno[2,3-b]pyridine-5-carboxylic acid; Thieno[2,3-b]pyridine-5-carboxylic acid, 7-ethyl-4,7-dihydro-4-oxo-; 7-Ethyl-4,7-dihydro-4-oxo-thieno[2,3-b]pyridine-5-carboxylic acid; 4-Oxo-7-ethyl-4,7-dihydrothieno[2,3-b]pyridine-5-carboxylic acid; 7-Ethyl-4,7-dihydro-4-oxothieno[2,3-b]pyridine-5-carboxylate (acid form); CAS 55503-33-8
EINECS	Contact for details

Quality Control

Our 7-Ethyl-4,7-Dihydro-4-Oxo-Thieno[2,3-B]-Pyridine-5-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for pharmaceutical R&D and synthesis. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment to guarantee traceability, consistency, and reliability for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (typically 15-25°C). Keep away from incompatible materials. For long-term storage, consider inert atmosphere conditions to ensure optimal stability.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
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.