Description

2-(2-Cyclopentylvinyl)-4,4,5,5-Tetramethyl-1,3,2-Dioxaborolane is a high-value organoboron reagent, specifically a vinylboronic ester, widely used in advanced organic synthesis. Its core value proposition lies in enabling precise carbon-carbon bond formation, which is fundamental for constructing complex molecular architectures. This compound is essential for researchers and process chemists in the pharmaceutical, agrochemical, and materials science industries who require reliable, high-purity building blocks for cross-coupling reactions.

Application

• Suzuki-Miyaura Cross-Coupling Reactions: A key reagent for introducing the cyclopentylvinyl moiety into target molecules, enabling the synthesis of complex organic compounds.
• Pharmaceutical Intermediate Synthesis: Used in the research and development of active pharmaceutical ingredients (APIs), particularly for creating novel carbon scaffolds.
• Agrochemical Product Development: Serves as a building block in the synthesis of new herbicides, fungicides, and insecticides with tailored properties.
• Materials Science & Organic Electronics: Employed in the synthesis of conjugated polymers and small molecules for applications in OLEDs, organic photovoltaics, and sensors.
• Chemical Biology & Medicinal Chemistry: Utilized in the preparation of chemical probes and tool compounds for target identification and validation.
• Catalyst & Ligand Development: Acts as a precursor for novel ligands and catalysts used in asymmetric synthesis and other catalytic processes.

Basic Information

Product Name	2-(2-Cyclopentylvinyl)-4,4,5,5-Tetramethyl-1,3,2-Dioxaborolane
CAS No.	157945-82-9
Molecular Formula	C₁₃H₂₃BO₂
Molecular Weight	222.13 g/mol
Synonyms	2-(2-Cyclopentylvinyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; (2-Cyclopentylvinyl)boronic acid pinacol ester; Cyclopentylvinylboronic acid pinacol ester; 2-(Cyclopent-1-en-1-yl)vinyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; (E)-2-(2-Cyclopentylvinyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; (2-Cyclopentylvinyl)BPin; Pinacol (2-cyclopentylvinyl)boronate
EINECS	Contact for details

Quality Control

Our 2-(2-Cyclopentylvinyl)-4,4,5,5-Tetramethyl-1,3,2-Dioxaborolane is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including NMR, HPLC, and GC analysis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory requirements.

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). This compound is hygroscopic (moisture-sensitive) and should be handled under an inert atmosphere (e.g., nitrogen or argon) for prolonged use or when opening the primary container to prevent degradation.

Specification

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

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