Description

(-)-3-Methyl-2-Butenoic Acid 3,4-Dihydro-5-Hydroxy-2,2,8-Trimethyl-6-Oxo-2H,6H-Benzo[1,2-B:5,4-B']Dipyran-3-Yl Ester is a high-purity, optically active chemical intermediate with a complex fused pyran structure. This compound is valued for its role as a key chiral building block in advanced organic synthesis, enabling the production of sophisticated molecules with specific stereochemistry. It is primarily sought after by research institutions and manufacturers in the pharmaceutical and fine chemical sectors for developing novel active ingredients and specialty materials.

Application

• Pharmaceutical Intermediate: A critical chiral synthon for the research and development of new drug candidates, particularly in therapeutic areas requiring complex molecular architectures.
• Fine Chemical Synthesis: Used in the multi-step synthesis of complex natural products, flavors, fragrances, and other high-value specialty chemicals.
• Asymmetric Catalysis Research: Serves as a substrate or ligand precursor in academic and industrial research focused on developing new stereoselective reactions.
• Material Science Precursor: Potential use in synthesizing advanced organic materials with specific optical or electronic properties due to its rigid, fused-ring system.
• Reference Standard: Supplied as a high-purity analytical standard for quality control and method development in analytical laboratories.

Basic Information

Item	Details
Product Name	(-)-3-Methyl-2-Butenoic Acid 3,4-Dihydro-5-Hydroxy-2,2,8-Trimethyl-6-Oxo-2H,6H-Benzo[1,2-B:5,4-B']Dipyran-3-Yl Ester
CAS No.	41689-80-9
Molecular Formula	C20H24O6
Molecular Weight	360.40 g/mol
Synonyms	(-)-3-Methyl-2-butenoic acid 3,4-dihydro-5-hydroxy-2,2,8-trimethyl-6-oxo-2H,6H-benzo[1,2-b:5,4-b']dipyran-3-yl ester; (3S)-3,4-Dihydro-5-hydroxy-2,2,8-trimethyl-6-oxo-2H,6H-benzo[1,2-b:5,4-b']dipyran-3-yl 3-methylbut-2-enoate; Karanjin; Pongamol; Pongapin; 3-Methylbut-2-enoic acid (3S)-3,4-dihydro-5-hydroxy-2,2,8-trimethyl-6-oxo-2H,6H-benzo[1,2-b:5,4-b']dipyran-3-yl ester
EINECS	Contact for details

Quality Control

Our (-)-3-Methyl-2-Butenoic Acid 3,4-Dihydro-5-Hydroxy-2,2,8-Trimethyl-6-Oxo-2H,6H-Benzo[1,2-B:5,4-B']Dipyran-3-Yl Ester is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing, including chiral purity analysis, to ensure identity, potency, and consistency. A detailed Certificate of Analysis (COA) documenting purity, specific rotation, and impurity profiles is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep the container tightly sealed when not in use to protect from moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Chiral Purity (Chiral HPLC)	≥ 99.0% ee
Specific Rotation	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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