Description

Cyclobutyltriphenylphosphonium Bromide is a high-purity organophosphorus salt widely used as a key reagent in advanced organic synthesis. Its primary value lies in its role as a versatile Wittig reagent for the efficient construction of cyclobutene-containing olefins, which are valuable intermediates in pharmaceutical and materials chemistry. This compound is essential for R&D chemists and process development scientists working in pharmaceutical, agrochemical, and specialty chemical industries.

Application

• As a Wittig reagent for the synthesis of cyclobutene derivatives and strained olefins.
• Key intermediate in the preparation of pharmaceutical active ingredients (APIs) with cyclobutyl motifs.
• Building block for agrochemicals and fine chemicals requiring specific ring structures.
• Used in material science research for creating novel polymers and ligands.
• Reagent in academic and industrial R&D for methodology development and complex molecule synthesis.
• Precursor for the synthesis of catalysts and other organophosphorus compounds.

Basic Information

Product Name	Cyclobutyltriphenylphosphonium Bromide
CAS No.	3666-89-5
Molecular Formula	C22H22BrP
Molecular Weight	397.29 g/mol
Synonyms	Triphenyl(cyclobutyl)phosphonium Bromide; Cyclobutyltriphenylphosphonium Bromide; Phosphonium, triphenylcyclobutyl-, bromide; Cyclobutyl(triphenyl)phosphonium Bromide; (Cyclobutyl)triphenylphosphonium Bromide; Cyclobutyl-triphenyl-phosphonium Bromide; Cyclobutyl(triphenyl)phosphonium Bromide Salt
EINECS	Contact for details

Quality Control

Our Cyclobutyltriphenylphosphonium Bromide is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements of advanced synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment and is available upon request.

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 product is hygroscopic (moisture-sensitive) and should be handled under inert atmosphere or in a dry environment to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%

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