Description

Isoxazolo[4,3-E]Pyrazolo[1,5-A]Pyrimidine (9Ci) is a high-purity heterocyclic organic compound with the CAS registry number 149626-22-2. This complex fused-ring system serves as a critical advanced pharmaceutical intermediate and a versatile scaffold in medicinal chemistry research. It is primarily required by R&D and production teams in the pharmaceutical, agrochemical, and specialty chemical industries for developing novel active ingredients.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of potential drug candidates targeting various therapeutic areas.
• Medicinal Chemistry Research: Core scaffold for structure-activity relationship (SAR) studies and library synthesis in drug discovery programs.
• Agrochemical Development: Intermediate in the research and synthesis of new-generation herbicides, fungicides, or insecticides.
• Chemical Biology Probe: Used as a specialized molecular tool to study biological pathways and protein functions.
• Material Science Precursor: Potential starting material for creating novel organic electronic materials or ligands for catalysis.

Basic Information

Product Name	Isoxazolo[4,3-E]Pyrazolo[1,5-A]Pyrimidine (9Ci)
CAS No.	149626-22-2
Molecular Formula	C7H4N4O
Molecular Weight	160.14 g/mol
Synonyms	Isoxazolo[4,3-e]pyrazolo[1,5-a]pyrimidine; 1H,5H-Isoxazolo[4,3-e]pyrazolo[1,5-a]pyrimidine; 9CI Index Name; Fused tricyclic isoxazole-pyrazolo-pyrimidine; Isoxazolopyrazolopyrimidine scaffold
EINECS	Contact for details

Quality Control

Every batch of Isoxazolo[4,3-E]Pyrazolo[1,5-A]Pyrimidine (9Ci) is manufactured under strict quality management systems. Our products undergo rigorous analytical testing, including HPLC, NMR, and MS, to ensure high purity and batch-to-batch consistency suitable for research and development. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance protocols.

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 under inert atmosphere, please contact our technical team for specific recommendations.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to 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.