Description

2-Ethynyl-2,5,5-Trimethyl-3,4,4A,10B-Tetrahydro-2H,5H-Pyrano[3,2-C]Chromene is a complex, high-purity chromene derivative with a reactive ethynyl group, making it a valuable synthetic intermediate. This compound matters for its role in constructing intricate molecular architectures, particularly in advanced pharmaceutical research and fine chemical synthesis. It is needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and specialty chemical industries seeking to develop novel active ingredients or functional materials.

Application

• Pharmaceutical Intermediate: Serves as a key building block for the synthesis of novel drug candidates, particularly in central nervous system (CNS) and anti-inflammatory therapeutic areas.
• Agrochemical Research: Used in the development of new-generation pesticides and herbicides, leveraging its complex fused-ring structure.
• Material Science Precursor: Acts as a monomer or cross-linking agent in the development of specialty polymers and advanced organic materials.
• Academic & R&D: Employed in university and institutional laboratories for methodological studies in organic synthesis and heterocyclic chemistry.
• Fine Chemical Synthesis: Utilized for the custom synthesis of complex, high-value molecules for various industrial applications.

Basic Information

Product Name	2-Ethynyl-2,5,5-Trimethyl-3,4,4A,10B-Tetrahydro-2H,5H-Pyrano[3,2-C]Chromene
CAS No.	320784-74-5
Molecular Formula	C₁₇H₁₈O₂
Molecular Weight	254.33 g/mol
Synonyms	2-Ethynyl-2,5,5-trimethyl-3,4,4a,10b-tetrahydro-2H,5H-pyrano[3,2-c]chromene; 2-Ethynyl-2,5,5-trimethyl-2,3,4,4a,5,10b-hexahydropyrano[3,2-c]chromene; Pyrano[3,2-c]chromene, 2-ethynyl-2,5,5-trimethyl-3,4,4a,10b-tetrahydro-2H,5H-; Chromene derivative with ethynyl group; Fused chromene-ethynyl intermediate
EINECS	Contact for details

Quality Control

Our 2-Ethynyl-2,5,5-Trimethyl-3,4,4A,10B-Tetrahydro-2H,5H-Pyrano[3,2-C]Chromene is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and NMR/IR for structural confirmation, to ensure it meets the high standards required for research and development. Certificates of Analysis (COA) detailing all specifications are available upon request 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 a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its light-sensitive nature, handling should be performed under subdued light or in amber glass containers when possible.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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