Description

5-Chloropyrazolo[1,5-a]thieno[2,3-e]pyrimidine-3-carboxylic acid is a high-purity, multi-heterocyclic carboxylic acid derivative, serving as a critical advanced pharmaceutical intermediate. Its complex fused-ring structure makes it a valuable building block for the synthesis of novel active pharmaceutical ingredients (APIs) and agrochemicals. This compound is primarily sought by R&D chemists and process development teams in the pharmaceutical and agrochemical industries for creating new molecules with targeted biological activity.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly those targeting kinase inhibition or other enzyme-related pathways.
• Agrochemical Research: Used in the development of new herbicides, fungicides, or insecticides, leveraging its heterocyclic scaffold for bioactivity.
• Chemical Biology & Probe Development: Serves as a core structure for creating molecular probes to study biological processes and identify new drug targets.
• Material Science Research: Potential building block for organic electronic materials or metal-organic frameworks (MOFs) due to its conjugated system and carboxylic acid functionality.
• Contract Research & Development (CRO/CMO): Supplied to research organizations for custom synthesis and library development for client projects.

Basic Information

Product Name	5-Chloropyrazolo[1,5-a]thieno[2,3-e]pyrimidine-3-carboxylic Acid
CAS No.	680210-93-9
Molecular Formula	C9H4ClN3O2S
Molecular Weight	253.66 g/mol
Synonyms	5-Chloro-3-pyrazolo[1,5-a]thieno[2,3-e]pyrimidinecarboxylic acid; 5-Chloro-pyrazolo[1,5-a]thieno[2,3-e]pyrimidine-3-carboxylic acid; 680210-93-9; 5-Chloro-3H-pyrazolo[1,5-a]thieno[2,3-e]pyrimidine-3-carboxylic acid; 5-Chloro-pyrazolo[1,5-a]thieno[2,3-e]pyrimidine-3-carboxylic acid; 5-Chloro-3H-pyrazolo[1,5-a]thieno[2,3-e]pyrimidine-3-carboxylic acid
EINECS	Contact for details

Quality Control

Our 5-Chloropyrazolo[1,5-a]thieno[2,3-e]pyrimidine-3-carboxylic acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, NMR and IR for structural confirmation, and residual solvent analysis, to ensure it meets the stringent requirements for pharmaceutical R&D. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability, consistency, and compliance with your 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). Keep away from strong acids and incompatible materials. For long-term storage, consider storing under an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 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.