Description

2H-Pyran-2-Carboxylicacid,3,4-Dihydro-4-Oxo-,Methylester(9Ci) is a high-purity heterocyclic building block and synthetic intermediate of significant interest in advanced organic synthesis. This compound matters for its role as a versatile precursor in the development of complex molecules, particularly in pharmaceutical research and fine chemical manufacturing. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and specialty chemical industries seeking to construct novel pyran and dihydropyranone scaffolds.

Application

• Pharmaceutical Intermediate: A key building block for synthesizing active pharmaceutical ingredients (APIs) and drug candidates, particularly those containing dihydropyranone or lactone motifs.
• Agrochemical Synthesis: Used in the research and development of novel herbicides, fungicides, and insecticides where the pyran core structure is pharmacologically relevant.
• Fine Chemical Production: Serves as a precursor for creating specialty chemicals, flavors, fragrances, and advanced materials requiring specific heterocyclic architectures.
• Academic & Industrial R&D: Employed in methodological chemistry research, including cyclization reactions, heterocycle formation, and the study of new catalytic processes.
• Chemical Library Development: Utilized in combinatorial chemistry and high-throughput screening for generating diverse compound libraries for biological evaluation.

Basic Information

Product Name	2H-Pyran-2-Carboxylicacid,3,4-Dihydro-4-Oxo-,Methylester(9Ci)
CAS No.	333719-20-3
Molecular Formula	C7H8O4
Molecular Weight	156.14 g/mol
Synonyms	Methyl 4-oxo-3,4-dihydro-2H-pyran-2-carboxylate; 4-Oxo-3,4-dihydro-2H-pyran-2-carboxylic acid methyl ester; 2H-Pyran-2-carboxylic acid, 3,4-dihydro-4-oxo-, methyl ester; Methyl 4-oxo-4H-pyran-2-carboxylate (tautomer); 4-Oxo-4H-pyran-2-carboxylic acid methyl ester; Dihydro-4-oxo-2H-pyran-2-carboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Our 2H-Pyran-2-Carboxylicacid,3,4-Dihydro-4-Oxo-,Methylester(9Ci) is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing including HPLC, GC, NMR, and mass spectrometry to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 15-25°C). Keep away from strong oxidizing agents and incompatible materials. For long-term storage, consider an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Residual Solvents (GC)	Meets ICH guidelines
Water Content (KF)	≤ 0.5%

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