Description

2,3-Dihydropyran CAS NO 25512-65-6 is a versatile heterocyclic organic compound primarily used as a key protecting group reagent in complex organic synthesis. Its value lies in its ability to efficiently mask hydroxyl groups, forming acid-labile tetrahydropyranyl (THP) ethers, which are crucial for multi-step synthesis strategies. This makes it an essential intermediate for researchers and manufacturers in the pharmaceutical, agrochemical, and fine chemical industries who require precise control over reaction pathways.

Application

• Pharmaceutical Intermediate: A critical reagent for the protection of alcohol functionalities during the synthesis of active pharmaceutical ingredients (APIs) and complex drug molecules.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and plant growth regulators where selective protection is required.
• Fine Chemical Production: Serves as a building block and protecting group in the manufacture of flavors, fragrances, and specialty chemicals.
• Polymer Chemistry: Employed in the synthesis of specialized monomers and functional polymers.
• Academic & R&D Laboratories: A staple reagent in research for methodology development and the synthesis of novel organic compounds.
• Cross-Coupling Reactions: Acts as a precursor or additive in various metal-catalyzed coupling reactions.

Basic Information

Product Name	2,3-Dihydropyran
CAS No.	25512-65-6
Molecular Formula	C5H8O
Molecular Weight	84.12 g/mol
Synonyms	2,3-Dihydro-4H-pyran; 3,4-Dihydro-2H-pyran; DHP; 2H-3,4-Dihydropyran; 4H-Dihydropyran; 2,3-Dihydro-2H-pyran; 3,4-Dihydro-2H-pyran-4-ol (tautomer); Tetrahydropyran-4-ol precursor
EINECS	247-066-8

Quality Control

Our 2,3-Dihydropyran is produced under strict quality management systems. Every batch undergoes rigorous analytical testing, including GC and NMR analysis, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee it meets your specific research or production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, well-ventilated area away from heat sources and incompatible materials. Due to its highly volatile nature, ensure containers are kept tightly sealed when not in use. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.440 - 1.444
Density (g/mL at 20°C)	0.920 - 0.930

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