Description

Thieno[2,3-D:4,5-D]Diisoxazole (9Ci) CAS NO 63666-50-2 is a specialized heterocyclic organic compound featuring a fused thiophene and diisoxazole ring system, serving as a high-value synthetic intermediate. This compound is prized for its unique molecular architecture, which makes it a critical building block in advanced organic synthesis and materials science research. It is primarily sought after by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials sectors for constructing complex molecular frameworks.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel active pharmaceutical ingredients (APIs), particularly for candidates targeting central nervous system (CNS) disorders or with specific heterocyclic pharmacophores.
• Agrochemical Research: Used in developing new generations of herbicides, fungicides, or insecticides where the fused ring system contributes to biological activity and environmental stability.
• Organic Electronic Materials: Serves as a core structure in the research and development of organic semiconductors, OLED (Organic Light-Emitting Diode) materials, or conductive polymers due to its electron-rich, planar configuration.
• Ligand Synthesis in Catalysis: Employed as a starting material for creating sophisticated ligands used in asymmetric catalysis and transition metal complexes.
• Academic & Industrial R&D: A valuable reagent for methodological studies in heterocyclic chemistry, ring-forming reactions, and the exploration of new chemical space in discovery chemistry.

Basic Information

Item	Details
Product Name	Thieno[2,3-D:4,5-D]Diisoxazole (9Ci)
CAS No.	63666-50-2
Molecular Formula	C7H3NO2S
Molecular Weight	165.17 g/mol
Synonyms	Thieno[2,3-d:4,5-d']diisoxazole; Thieno[2,3-d:4,5-d']bis(isoxazole); 1,3a,6a-Triazapentalene, thieno[2,3-d] analog; 63666-50-2; Thienodiisoxazole; [1,3]Oxazolo[5',4':4,5]thieno[2,3-d][1,3]oxazole
EINECS	Contact for details

Quality Control

Our production of Thieno[2,3-D:4,5-D]Diisoxazole adheres to stringent internal quality protocols to ensure batch-to-batch consistency and high purity for research applications. Each lot is characterized using advanced analytical techniques including HPLC, GC-MS, and NMR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment. We support cGMP and ISO 9001 aligned practices for traceability and documentation.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). The compound should be kept under an inert atmosphere if long-term storage is required to prevent potential degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (HPLC/IR)	Conforms to reference standard
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 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.