Description

Cyclopent-2-En-1-Ylboronic Acid Pinacol Ester is a high-purity, organoboron building block essential for modern synthetic chemistry. This compound is a critical reagent in Suzuki-Miyaura cross-coupling reactions, enabling the efficient construction of complex carbon-carbon bonds. It is primarily utilized by pharmaceutical R&D teams, agrochemical manufacturers, and advanced material scientists for the synthesis of novel, functionalized cyclic compounds.

Application

• Pharmaceutical Intermediate Synthesis: A key building block for creating novel drug candidates, particularly those containing functionalized cyclopentene scaffolds.
• Agrochemical Research & Development: Used in the synthesis of advanced active ingredients and herbicides with complex cyclic structures.
• Material Science: Employed in the development of organic electronic materials, polymers, and liquid crystals via palladium-catalyzed coupling.
• Suzuki-Miyaura Cross-Coupling Reactions: Serves as a versatile coupling partner with various aryl or vinyl halides to form new C-C bonds.
• Academic & Contract Research: A valuable reagent for methodology development and the synthesis of complex natural product analogs in research laboratories.
• Fine Chemical Production: Used in the multi-step synthesis of specialty chemicals and flavors & fragrances.

Basic Information

Product Name	Cyclopent-2-En-1-Ylboronic Acid Pinacol Ester
CAS No.	287944-11-0
Molecular Formula	C11H19BO2
Molecular Weight	194.08 g/mol
Synonyms	2-Cyclopenten-1-ylboronic acid pinacol ester; (2-Cyclopenten-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; Cyclopent-2-en-1-ylboronic acid pinacol ester; 4,4,5,5-Tetramethyl-2-(2-cyclopenten-1-yl)-1,3,2-dioxaborolane; 2-Cyclopentenylboronic Acid Pinacol Ester; Cyclopentenyl Pinacol Boronate; Cyclopent-2-enylboronic Acid Pinacol Ester
EINECS	Contact for details

Quality Control

Our Cyclopent-2-En-1-Ylboronic Acid Pinacol Ester is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including NMR, HPLC, and GC analysis, to ensure high chemical purity and consistent performance in sensitive coupling reactions. A comprehensive Certificate of Analysis (COA) detailing purity, identity, 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 place at room temperature (15-25°C). Keep the container sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term stability to prevent potential degradation.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (NMR)	Conforms to structure
Purity (GC/HPLC)	≥ 95% (Typical 97-99%)
Water Content (KF)	≤ 0.5%

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