Description

4-Isoxazolecarbonyl Chloride, 5-Isobutyl-3-Methyl- (7Ci) is a specialized heterocyclic acid chloride derivative that serves as a critical building block in advanced organic synthesis. Its reactive carbonyl chloride group makes it a versatile intermediate for constructing complex molecules, particularly in the development of novel active pharmaceutical ingredients (APIs) and agrochemicals. This high-purity intermediate is essential for research and production chemists in the pharmaceutical, agrochemical, and fine chemical industries who require reliable, high-quality raw materials for complex synthetic routes.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, particularly in medicinal chemistry research targeting new therapeutic agents.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and fungicides where the isoxazole moiety imparts specific biological activity.
• Fine Chemical Production: Serves as a precursor for creating complex specialty chemicals, dyes, and functional materials.
• Academic & Industrial R&D: Employed in research laboratories for method development and exploring new chemical reactions involving heterocyclic compounds.
• Peptide Mimetic & Bioactive Compound Synthesis: The reactive acid chloride group facilitates amide bond formation, useful for creating peptide analogs and other bioactive molecules.

Basic Information

Product Name	4-Isoxazolecarbonyl Chloride, 5-Isobutyl-3-Methyl- (7Ci)
CAS No.	90415-81-9
Molecular Formula	C9H12ClNO2
Molecular Weight	201.65 g/mol
Synonyms	5-Isobutyl-3-methyl-4-isoxazolecarbonyl chloride; 3-Methyl-5-isobutylisoxazole-4-carbonyl chloride; 4-Isoxazolecarbonyl chloride, 5-isobutyl-3-methyl-; 90415-81-9; 5-(2-Methylpropyl)-3-methyl-1,2-oxazole-4-carbonyl chloride
EINECS	Contact for details

Quality Control

Our 4-Isoxazolecarbonyl Chloride, 5-Isobutyl-3-Methyl- (7Ci) is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity suitable for sensitive synthetic applications. Each lot undergoes comprehensive analytical testing, including HPLC, NMR, and IR spectroscopy, to verify identity and purity. Certificates of Analysis (COA) detailing all test results are provided with every shipment. We adhere to cGMP principles where applicable to support our customers in regulated industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and should be handled under an inert atmosphere (e.g., nitrogen or argon) to prevent decomposition. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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