Description

Cyclopenylmethyl Tosylate CAS NO 21856-53-1 is a specialized organic sulfonate ester, serving as a versatile alkylating agent and a key synthetic intermediate in advanced organic chemistry. Its primary value lies in its ability to introduce the cyclopentylmethyl group into target molecules, a structural motif of significant interest in pharmaceutical and agrochemical research. This compound is essential for research chemists and process development scientists in the pharmaceutical, agrochemical, and fine chemical industries who require high-purity building blocks for complex synthesis.

Application

• Pharmaceutical Intermediate: A critical building block for the synthesis of active pharmaceutical ingredients (APIs), particularly those containing cyclopentane or cyclopentylmethyl pharmacophores.
• Agrochemical Synthesis: Used in the research and development of novel pesticides and herbicides where the cyclopentylmethyl moiety can enhance biological activity.
• Fine Chemical Production: Employed as an alkylating agent in the multi-step synthesis of complex organic molecules, flavors, and fragrances.
• Material Science Research: Acts as a monomer or cross-linking agent precursor in the development of specialty polymers and advanced materials.
• Academic & R&D Laboratories: A valuable reagent for methodological studies in organic synthesis, including nucleophilic substitution reactions and catalyst development.

Basic Information

Product Name	Cyclopenylmethyl Tosylate
CAS No.	21856-53-1
Molecular Formula	C13H18O3S
Molecular Weight	254.34 g/mol
Synonyms	Cyclopentylmethyl p-Toluenesulfonate; (Cyclopentylmethyl) 4-methylbenzenesulfonate; Tosylcyclopentylmethane; p-Toluenesulfonic Acid Cyclopentylmethyl Ester; Cyclopentylmethyl Tosylate; Cyclopentylmethyl Tosic Acid Ester; Cyclopentylmethyl Ester of p-Toluenesulfonic Acid; Cyclopentylmethyl 4-Methylbenzenesulfonate
EINECS	Contact for details

Quality Control

Our Cyclopenylmethyl Tosylate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatographic purity assays and identity confirmation, to ensure it meets the high standards required for research and industrial synthesis. Certificates of Analysis (COA) detailing purity, impurities, and physical characteristics are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). Keep away from strong bases and incompatible materials such as strong oxidizing agents. The material is light-sensitive and should be stored away from light.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%

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