Description

3-(But-2-Enyl)-2-Methyl-4-Oxocyclopent-2-Enyl2,2-Dimethyl-3-(3-Methoxy-2-Methyl-3-Oxoprop-1-Enyl)Cyclopropanecarboxylate is a high-purity synthetic intermediate with a complex cyclopropane and cyclopentenone structure. This compound is valued for its role as a key building block in the synthesis of advanced active ingredients, particularly in the agrochemical and pharmaceutical sectors. Industrial buyers and R&D teams in fine chemical manufacturing require this material for its specific reactivity and structural features, enabling the development of novel compounds with targeted biological activity.

Application

• Agrochemical Intermediate: A critical precursor in the synthesis of advanced pyrethroid and other insecticide active ingredients.
• Pharmaceutical Synthesis: Serves as a specialized building block for constructing complex molecular frameworks in drug discovery and development.
• Fine Chemical Production: Used in the manufacture of high-value specialty chemicals requiring specific stereochemistry and functional groups.
• Research & Development: Employed in academic and industrial labs for studying cyclopropane chemistry and developing new synthetic methodologies.
• Chemical Intermediate for Dyes & Pigments: Can be utilized in the synthesis of complex organic colorants.

Basic Information

Product Name	3-(But-2-Enyl)-2-Methyl-4-Oxocyclopent-2-Enyl2,2-Dimethyl-3-(3-Methoxy-2-Methyl-3-Oxoprop-1-Enyl)Cyclopropanecarboxylate
CAS No.	121-20-0
Molecular Formula	C22H30O5
Molecular Weight	374.47 g/mol
Synonyms	Allethrin; d-Allethrin; (RS)-3-Allyl-2-methyl-4-oxocyclopent-2-enyl (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropanecarboxylate; Pynamin; Pyresin; d-trans-Allethrin; Bioallethrin; S-Bioallethrin; Pyrethroid intermediate
EINECS	204-455-8

Quality Control

Our 3-(But-2-Enyl)-2-Methyl-4-Oxocyclopent-2-Enyl2,2-Dimethyl-3-(3-Methoxy-2-Methyl-3-Oxoprop-1-Enyl)Cyclopropanecarboxylate is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing including HPLC, GC, and NMR to ensure identity, purity, and consistency. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications. We support cGMP and ISO 9001 standards for manufacturing and quality assurance.

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). This material is easily oxidized; for long-term storage, consider maintaining under an inert atmosphere such as nitrogen. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Related Substances (HPLC)	Total impurities ≤ 5.0%
Specific Rotation	Contact for details
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.