Description

7-Ethyl-2-Methyl-4-Oxo-3-Phenyl-4,7-Dihydrothieno[2,3-B]Pyridine-5-Carboxylic Acid is a high-purity, advanced pharmaceutical intermediate characterized by its complex fused-ring heterocyclic structure. This compound matters for its critical role as a key building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly in therapeutic areas requiring sophisticated molecular architectures. Pharmaceutical R&D departments and fine chemical manufacturers need this material for developing next-generation drugs, leveraging its unique scaffold to create molecules with targeted biological activity.

Application

• Pharmaceutical Intermediate: Serves as a crucial precursor in the multi-step synthesis of novel drug candidates, especially in central nervous system (CNS) and anti-inflammatory research.
• Organic Synthesis Building Block: Used in medicinal chemistry for constructing complex thienopyridine-based heterocycles, enabling structure-activity relationship (SAR) studies.
• Research & Development (R&D): Essential for academic and industrial laboratories exploring new chemical entities and pharmacological mechanisms.
• Active Pharmaceutical Ingredient (API) Development: A key starting material (KSM) or intermediate in the process development and scale-up of potential APIs.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for custom synthesis projects under cGMP conditions.
• Reference Standard: Can be utilized as an analytical standard for quality control and method development in pharmaceutical analysis.

Basic Information

Product Name	7-Ethyl-2-Methyl-4-Oxo-3-Phenyl-4,7-Dihydrothieno[2,3-B]Pyridine-5-Carboxylic Acid
CAS No.	67637-70-1
Molecular Formula	C₁₈H₁₅NO₃S
Molecular Weight	325.38 g/mol
Synonyms	4,7-Dihydro-7-ethyl-2-methyl-4-oxo-3-phenylthieno[2,3-b]pyridine-5-carboxylic acid; 3-Phenyl-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-3-phenyl-; 7-Ethyl-2-methyl-4-oxo-3-phenyl-4,7-dihydrothieno[2,3-b]pyridine-5-carboxylic acid; CAS 67637-70-1
EINECS	Contact for details

Quality Control

Our 7-Ethyl-2-Methyl-4-Oxo-3-Phenyl-4,7-Dihydrothieno[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 manufacturing. Certificates of Analysis (COA) detailing all test results are available upon request, providing full traceability and compliance data.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). The compound may be light-sensitive; prolonged exposure to light should be avoided. Keep the container tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Related Substances (HPLC)	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.