Description

Thieno[3,4-D]Pyrimidine (8Ci,9Ci) is a heterocyclic organic compound featuring a fused thiophene and pyrimidine ring system, serving as a versatile and high-value synthetic building block. This specialized intermediate is critical for the development of novel compounds in advanced research and industrial synthesis. It is primarily sought after by pharmaceutical R&D teams, agrochemical innovators, and academic research institutions focused on medicinal chemistry and material science.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of potential drug candidates, particularly for kinase inhibitors and other targeted therapies.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and plant growth regulators.
• Material Science: Serves as a building block for organic electronic materials, such as semiconductors and light-emitting diodes (OLEDs).
• Chemical Synthesis: A valuable scaffold for constructing complex heterocyclic libraries for high-throughput screening in drug discovery.
• Academic & Contract Research: Employed in universities and CROs for fundamental research in organic chemistry and reaction methodology development.

Basic Information

Product Name	Thieno[3,4-D]Pyrimidine (8Ci,9Ci)
CAS No.	271-07-8
Molecular Formula	C6H4N2S
Molecular Weight	136.17 g/mol
Synonyms	Thieno[3,4-d]pyrimidine; Thieno(3,4-d)pyrimidine; 4H-Thieno[3,4-d]pyrimidine; 271-07-8; NSC 221986; CCRIS 6058; Thienopyrimidine; 4H-Thieno(3,4-d)pyrimidine
EINECS	205-985-8

Quality Control

Our Thieno[3,4-D]Pyrimidine is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC, NMR, and GC-MS, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided with every shipment. We can support development projects with custom purity grades and analytical method development upon request.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95% (Standard Grade)
Purity (HPLC)	≥ 98% (High Purity Grade)
Loss on Drying	≤ 1.0 %
Residue on Ignition	≤ 0.1 %

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