Description

3,4-Dimethylenecyclobut-1-Ene is a highly reactive strained hydrocarbon featuring a cyclobutene ring with two exocyclic methylene groups. This unique structure makes it a valuable and versatile building block in advanced organic synthesis, particularly for constructing complex polycyclic frameworks. It is primarily sought after by research chemists and process development scientists in the pharmaceutical and advanced materials sectors for applications in Diels-Alder reactions and as a precursor to novel strained molecules.

Application

• Pharmaceutical Intermediate: Serves as a key synthon for constructing complex, strained-ring systems found in active pharmaceutical ingredients (APIs).
• Advanced Materials Research: Used in the development of novel polymers and organic electronic materials with unique optoelectronic properties.
• Organic Synthesis Building Block: A critical reagent in Diels-Alder cycloaddition reactions to create polycyclic compounds.
• Methodology Development: Employed in academic and industrial R&D for studying pericyclic reactions and strain-release chemistry.
• Specialty Chemical Synthesis: Acts as a precursor for synthesizing ligands, catalysts, and other high-value fine chemicals.

Basic Information

Product Name	3,4-Dimethylenecyclobut-1-Ene
CAS No.	5291-90-7
Molecular Formula	C6H6
Molecular Weight	78.11 g/mol
Synonyms	1,2-Dimethylenecyclobutene; 3,4-Dimethylidenecyclobut-1-ene; Bicyclo[2.2.0]hexa-1,4-diene; 1,4-Dihydro-1,4-ethenonaphthalene (in certain contexts); Dimethylenecyclobutene; 3,4-Dimethylene-1-cyclobutene; 3,4-Dimethylencyclobuten
EINECS	Contact for details

Quality Control

Our 3,4-Dimethylenecyclobut-1-Ene is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and high purity for research and development applications. Each lot is characterized using advanced analytical techniques including NMR, GC-MS, and HPLC. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at recommended temperatures between 2°C and 8°C (refrigerated) or as specified on the label. This compound is typically light-sensitive and may be prone to polymerization; avoid exposure to heat and strong oxidizers.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (NMR)	Conforms to structure
Purity (GC)	≥ 95% (Typical 97-99%)
Water Content (KF)	≤ 0.5%

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