Description

Cyclobutanecarboxylic Acid, 2-(Chloroformyl)-, Ethyl Ester (7Ci) is a specialized organic ester derivative of cyclobutanecarboxylic acid, serving as a high-value chemical intermediate. Its core value proposition lies in its bifunctional reactivity, offering both an activated ester and an acid chloride group for sequential or selective synthesis. This compound is essential for research chemists and process development scientists in the pharmaceutical and agrochemical industries, where it is used to construct complex, strained-ring molecular architectures. The CAS number for this product is 90532-26-6.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel active pharmaceutical ingredients (APIs), particularly those containing constrained cyclobutane rings to modulate biological activity and metabolic stability.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and insecticides, where the cyclobutane moiety can enhance product efficacy and environmental profile.
• Material Science Research: Serves as a monomer or cross-linking agent in the development of specialty polymers with unique thermal or mechanical properties derived from the strained four-membered ring.
• Organic Synthesis Reagent: A versatile reagent in academic and industrial R&D labs for introducing the cyclobutane carboxylate group into target molecules under mild conditions.
• Ligand and Catalyst Development: Employed in the preparation of chiral ligands or organometallic catalyst precursors for asymmetric synthesis applications.

Basic Information

Product Name	Cyclobutanecarboxylic Acid, 2-(Chloroformyl)-, Ethyl Ester (7Ci)
CAS No.	90532-26-6
Molecular Formula	C8H11ClO3
Molecular Weight	190.62 g/mol
Synonyms	2-(Chloroformyl)cyclobutanecarboxylic Acid Ethyl Ester; Ethyl 2-(Chlorocarbonyl)cyclobutanecarboxylate; 2-Carboxycyclobutanecarboxylic Acid Chloride Ethyl Ester; Cyclobutane-1,2-dicarboxylic Acid 1-Ethyl Ester 2-Acid Chloride; 7Ci (Code); Cyclobutanedicarboxylic Acid Monoethyl Ester Chloride
EINECS	Contact for details

Quality Control

Every batch of Cyclobutanecarboxylic Acid, 2-(Chloroformyl)-, Ethyl Ester (7Ci) is produced and analyzed under strict quality management protocols. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request, supporting your regulatory and R&D documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases, amines, and alcohols. Due to its nature as a strong acid/organic solvent derivative, it should be handled with appropriate precautions. Recommended storage temperature is 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
Water Content (KF)	≤ 0.5%

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