Description

(E)-But-2-En-1-Yltriphenylphosphonium Bromide is a high-purity Wittig reagent salt, a critical intermediate in organic synthesis. Its primary value lies in enabling the stereoselective synthesis of alkenes, a fundamental transformation for constructing complex molecular architectures. This compound is essential for researchers and process chemists in the pharmaceutical, agrochemical, and advanced materials sectors who require reliable, high-quality building blocks for R&D and production.

Application

• Wittig Olefination Reactions: As a key reagent for the stereoselective synthesis of (E)-configured alkenes and conjugated diene systems.
• Pharmaceutical Intermediate Synthesis: Used in the construction of active pharmaceutical ingredients (APIs) and complex natural product analogs.
• Agrochemical Manufacturing: Employed in the synthesis of insecticide and herbicide intermediates requiring specific alkene geometries.
• Liquid Crystal & OLED Material Production: Serves as a precursor for creating conjugated organic molecules used in electronic displays and devices.
• Polymer Science: Facilitates the synthesis of specialty monomers with defined double-bond configurations for advanced polymers.
• Academic & Industrial R&D: A staple reagent in organic chemistry laboratories for method development and novel compound discovery.

Basic Information

Product Name	(E)-But-2-En-1-Yltriphenylphosphonium Bromide
CAS No.	39741-81-6
Molecular Formula	C22H22BrP
Molecular Weight	397.29 g/mol
Synonyms	(E)-2-Buten-1-yltriphenylphosphonium Bromide; trans-2-Buten-1-yltriphenylphosphonium Bromide; (E)-Crotyltriphenylphosphonium Bromide; trans-Crotyltriphenylphosphonium Bromide; (E)-1-Bromo-2-butene Triphenylphosphonium Salt; Phosphonium, (2E)-2-buten-1-yltriphenyl-, bromide (1:1); P-[(1E)-1-Butenyl]triphenylphosphonium Bromide
EINECS	Contact for details

Quality Control

Our (E)-But-2-En-1-Yltriphenylphosphonium Bromide is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high chemical purity and consistent performance as a Wittig reagent. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided and available upon request, supporting compliance in cGMP and ISO environments.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere or in a desiccator after opening 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
Water Content (KF)	≤ 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.