Description

2-Butenylenebis(Triphenylphosphonium) Dibromide is a high-purity, organophosphonium salt widely utilized as a key reagent in advanced organic synthesis. Its primary value lies in its role as a versatile Wittig reagent for the stereoselective formation of conjugated diene systems, a critical transformation in pharmaceutical and fine chemical manufacturing. This compound is essential for R&D chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials sectors seeking to construct complex molecular architectures with precision.

Application

• Wittig Olefination Reagent: A crucial precursor for the synthesis of conjugated dienes and polyenes via the Wittig reaction, enabling the construction of vitamin A analogs, carotenoids, and other natural product frameworks.
• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and complex drug candidates that require specific alkene geometries.
• Agrochemical Synthesis: Employed in the production of advanced crop protection agents and pesticides where specific alkene chains are necessary for biological activity.
• Material Science Research: Serves as a building block in the development of organic semiconductors, liquid crystals, and polymers with tailored optical and electronic properties.
• Academic & Industrial R&D: A valuable tool for methodological development in organic chemistry and for scaling novel synthetic routes from lab to pilot plant.

Basic Information

Product Name	2-Butenylenebis(Triphenylphosphonium) Dibromide
CAS No.	18189-24-7
Molecular Formula	C46H42Br2P2
Molecular Weight	824.57 g/mol
Synonyms	(2-Butene-1,4-diyl)bis(triphenylphosphonium) dibromide; 1,4-Bis(triphenylphosphonio)-2-butene dibromide; trans-1,4-Bis(triphenylphosphonio)-2-butene dibromide; 2-Butenylene-1,4-bis(triphenylphosphonium bromide); Wittig Reagent for Diene Synthesis; DITU (common abbreviation)
EINECS	Contact for details

Quality Control

Our 2-Butenylenebis(Triphenylphosphonium) Dibromide is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high reactivity. Each lot is supported by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles. We adhere to cGMP guidelines where applicable, and our quality system is designed to meet the stringent requirements of pharmaceutical and fine chemical industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep the container tightly sealed in a desiccator for long-term storage.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Solubility	Soluble in polar organic solvents (e.g., DMF, DMSO)

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