Description

4H-Cyclopenta[3,4]Pyrazolo[1,5-A]Pyrimidin-4-One,2-Ethoxy-1,7,8,9-Tetrahydro-(9Ci) is a high-purity, advanced pharmaceutical intermediate with the CAS registry number 669771-41-9. This heterocyclic compound is valued for its complex fused-ring structure, which serves as a critical building block in modern medicinal chemistry. It is primarily sought by research and development teams in the pharmaceutical and biotechnology sectors for the synthesis of novel active pharmaceutical ingredients (APIs).

Application

• Pharmaceutical Intermediate: A key precursor in the multi-step synthesis of complex drug candidates, particularly those targeting central nervous system (CNS) disorders.
• Medicinal Chemistry Research: Used as a core scaffold for structure-activity relationship (SAR) studies and the development of new chemical entities (NCEs).
• API Development: Integral to the process development and scale-up of potential active pharmaceutical ingredients, especially within the pyrazolo-pyrimidinone chemical class.
• Contract Research & Manufacturing (CRO/CMO): Supplied to organizations specializing in custom synthesis and process optimization for client drug discovery programs.
• Academic Research: Utilized in university and institutional labs for fundamental studies in heterocyclic chemistry and novel synthetic methodology development.

Basic Information

Product Name	4H-Cyclopenta[3,4]Pyrazolo[1,5-A]Pyrimidin-4-One,2-Ethoxy-1,7,8,9-Tetrahydro-(9Ci)
CAS No.	669771-41-9
Molecular Formula	C11H13N3O2
Molecular Weight	219.24 g/mol
Synonyms	2-Ethoxy-1,7,8,9-tetrahydro-4H-cyclopenta[3,4]pyrazolo[1,5-a]pyrimidin-4-one; 2-Ethoxy-1,4,7,8,9,9a-hexahydrocyclopenta[3,4]pyrazolo[1,5-a]pyrimidin-4-one; 669771-41-9; 2-Ethoxy-1,7,8,9-tetrahydro-4H-cyclopenta[3,4]pyrazolo[1,5-a]pyrimidin-4-one; 4H-Cyclopenta[3,4]pyrazolo[1,5-a]pyrimidin-4-one, 2-ethoxy-1,7,8,9-tetrahydro-; 2-Ethoxy-1,4,7,8,9,9a-hexahydro-cyclopenta[3,4]pyrazolo[1,5-a]pyrimidin-4-one
EINECS	Contact for details

Quality Control

Our 4H-Cyclopenta[3,4]Pyrazolo[1,5-A]Pyrimidin-4-One,2-Ethoxy-1,7,8,9-Tetrahydro-(9Ci) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and MS, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided with every shipment. We support compliance with cGMP and ICH guidelines for pharmaceutical development.

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 incompatible materials. For long-term storage, consider storing under an inert atmosphere.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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