Description

3-Bromo-5,6-Dihydro-2H-Pyran-2-One is a versatile brominated lactone building block of significant interest in advanced organic synthesis. Its reactive bromine atom and unsaturated lactone core make it a valuable precursor for constructing complex heterocyclic frameworks and functionalized molecules. This high-purity intermediate is primarily sought after by research institutions and pharmaceutical development companies engaged in medicinal chemistry and the synthesis of novel active ingredients.

Application

• Pharmaceutical Intermediate: A key synthon in the research and development of new drug candidates, particularly for constructing fused heterocyclic systems.
• Agrochemical Synthesis: Used in the preparation of advanced intermediates for novel herbicides, fungicides, and insecticides.
• Material Science Research: Serves as a monomer or functionalization agent in the development of specialized polymers and advanced organic materials.
• Academic & R&D Laboratories: Employed in methodological studies and as a building block for synthesizing complex natural product analogs and chemical libraries.
• Fine Chemical Production: Utilized in the multi-step synthesis of specialty chemicals, flavors, and fragrances requiring specific bromo-lactone motifs.

Basic Information

Product Name	3-Bromo-5,6-Dihydro-2H-Pyran-2-One
CAS No.	104184-64-7
Molecular Formula	C5H5BrO2
Molecular Weight	177.00 g/mol
Synonyms	3-Bromo-5,6-dihydro-2H-pyran-2-one; 3-Bromotetrahydro-2H-pyran-2-one; 3-Bromo-δ-valerolactone; 3-Bromodihydro-2H-pyran-2(3H)-one; 3-Bromo-3,4-dihydro-2H-pyran-2-one; Bromodihydropyranone; 2H-Pyran-2-one, 3-bromo-5,6-dihydro-
EINECS	Contact for details

Quality Control

Every batch of 3-Bromo-5,6-Dihydro-2H-Pyran-2-One is produced under strict quality management protocols. We ensure compliance with relevant industry standards through rigorous in-process and final release testing, including chromatographic purity analysis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to guarantee traceability and batch-to-batch consistency for your critical R&D and production needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at controlled room temperature (typically 15-25°C). Keep away from heat, sparks, and open flame. This compound is moisture-sensitive; keep the container tightly sealed in a dry environment.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥97.0%
Melting Point	Contact for details
Loss on Drying	≤0.5%
Residue on Ignition	≤0.1%
Heavy Metals	≤20 ppm

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