Description

2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane is a high-purity, cyclic boronic ester derivative valued for its role as a versatile synthetic intermediate in advanced organic chemistry. This compound is critical for enabling key carbon-carbon bond-forming reactions, particularly in the synthesis of complex pharmaceutical and agrochemical molecules. It is primarily sought after by R&D chemists and process development teams in the fine chemical, pharmaceutical, and material science industries for constructing novel molecular architectures.

Application

• Suzuki-Miyaura Cross-Coupling Reactions: A key reagent for the palladium-catalyzed coupling with aryl/vinyl halides to introduce the cyclopentenyl moiety into target molecules.
• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, especially those requiring functionalized cyclopentene rings.
• Agrochemical Synthesis: Serves as a building block for creating novel herbicides, fungicides, and insecticides with specific activity profiles.
• Material Science & Polymer Chemistry: Employed in the development of specialty monomers and functional polymers, including liquid crystals and organic electronic materials.
• Organic Synthesis & Methodology Development: A valuable tool for academic and industrial researchers exploring new catalytic cycles and synthetic transformations involving organoboron compounds.
• Ligand & Catalyst Preparation: Can be utilized to synthesize novel bidentate or chiral ligands for asymmetric catalysis.

Basic Information

Product Name	2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
CAS No.	287944-10-9
Molecular Formula	C11H19BO2
Molecular Weight	194.08 g/mol
Synonyms	2-Cyclopenten-1-yl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; Cyclopentenyl pinacol boronate; CyclopentenylBpin; 2-(Cyclopent-1-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; 1-Cyclopenten-1-yl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; Pinacol cyclopentenylboronate; Cyclopenten-1-ylboronic acid pinacol ester
EINECS	Contact for details

Quality Control

Our production of 2-Cyclopentenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including NMR, GC, and HPLC analysis, to confirm identity and purity. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). The compound is moisture-sensitive; keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to maintain optimal stability and purity. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (NMR)	Conforms to structure
Purity (GC/HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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