Description

Thieno[2,3-D:5,4-D]Diisoxazole (9Ci) is a specialized heterocyclic organic compound, identified by CAS NO 63666-51-3, that serves as a high-value synthetic intermediate and building block. Its unique fused-ring structure containing thiophene and isoxazole moieties makes it a critical precursor for advanced research and development in medicinal chemistry and material science. This compound is primarily sought by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and advanced materials sectors for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly for candidates targeting central nervous system (CNS) disorders and anti-infective agents.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging its heterocyclic core for bioactivity.
• Material Science Precursor: Serves as a monomer or precursor for organic semiconductors, conductive polymers, and non-linear optical (NLO) materials due to its electron-rich structure.
• Ligand Synthesis: Employed in the preparation of complex ligands for catalysis and coordination chemistry.
• Academic & Industrial R&D: A valuable reagent for method development and exploring new chemical spaces in heterocyclic chemistry.
• Fluorescent Dye & Sensor Development: Its rigid, conjugated system makes it a candidate for developing fluorescent probes and chemosensors.

Basic Information

Product Name	Thieno[2,3-D:5,4-D]Diisoxazole (9Ci)
CAS No.	63666-51-3
Molecular Formula	C7H3NO2S
Molecular Weight	165.17 g/mol
Synonyms	Thieno[2,3-d:5,4-d']diisoxazole; Thieno[2,3-d:5,4-d']bis(isoxazole); 63666-51-3; Thienodiisoxazole; Thienobis(isoxazole); NSC 407348; Thieno-diisoxazole; 4H-Thieno[2,3-d:5,4-d']diisoxazole
EINECS	Contact for details

Quality Control

Every batch of Thieno[2,3-D:5,4-D]Diisoxazole (9Ci) is manufactured and tested under a strict quality management system. We provide comprehensive analytical data to ensure the compound meets the high-purity standards required for research and process chemistry. A detailed Certificate of Analysis (COA) is supplied with each shipment, confirming identity, purity, and impurity profile as determined by advanced chromatographic and spectroscopic methods.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). The compound should be kept under an inert atmosphere for long-term storage to ensure stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	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.