Description

Thieno[2,3-b]pyrazine-6-carboxylic acid, 7-[(carboxycarbonyl)amino]- is a high-purity, multifunctional heterocyclic carboxylic acid derivative. This compound is a critical advanced pharmaceutical intermediate (API) valued for its unique fused-ring structure, which serves as a versatile scaffold in medicinal chemistry. It is primarily sought by pharmaceutical R&D and fine chemical synthesis teams for developing novel therapeutic agents.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel drug candidates, particularly in oncology and antiviral research.
• Organic Synthesis Reagent: Used as a precursor for constructing complex heterocyclic systems and functionalized molecules in academic and industrial research.
• Agrochemical Development: Serves as a core structure for developing new active ingredients with potential pesticidal or herbicidal properties.
• Material Science Research: Investigated as a monomer or dopant for creating organic semiconductors and conductive polymers.
• Bioconjugation Chemistry: The carboxylic acid and carbamate functionalities enable its use in linker chemistry for antibody-drug conjugates (ADCs) or probe labeling.

Basic Information

Product Name	Thieno[2,3-b]pyrazine-6-carboxylic acid, 7-[(carboxycarbonyl)amino]-
CAS No.	243463-04-9
Molecular Formula	C9H5N3O5S
Molecular Weight	267.22 g/mol
Synonyms	7-[(Carboxycarbonyl)amino]thieno[2,3-b]pyrazine-6-carboxylic acid; 7-[(Methoxycarbonyl)amino]thieno[2,3-b]pyrazine-6-carboxylic acid (common related ester); 7-Aminocarbonyloxythieno[2,3-b]pyrazine-6-carboxylic acid; Thienopyrazine-6-carboxylic acid derivative; CAS 243463-04-9; 7-Ureidothieno[2,3-b]pyrazine-6-carboxylic acid (alternative naming); 6-Carboxy-7-ureidothieno[2,3-b]pyrazine
EINECS	Contact for details

Quality Control

Our production of Thieno[2,3-b]pyrazine-6-carboxylic acid, 7-[(carboxycarbonyl)amino]- adheres to stringent quality protocols suitable for pharmaceutical R&D applications. Each batch undergoes comprehensive analytical testing, including HPLC for purity and spectroscopic identification (NMR, IR, MS). A detailed Certificate of Analysis (COA) is provided with every shipment to ensure traceability and compliance with your research specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its acidic/organic solvent nature and light sensitivity, prolonged exposure to heat, moisture, or direct light should be avoided to maintain stability.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.5%

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