Description

Thieno[2,3-D]Pyrimidin-4(3H)-One, 6-Ethyl-3-(1-Methylethyl)- (9Ci) is a high-purity, advanced pharmaceutical intermediate belonging to the thienopyrimidine class of heterocyclic compounds. Its complex fused-ring structure makes it a critical building block for medicinal chemistry research and the synthesis of novel active pharmaceutical ingredients (APIs). This compound is primarily sought by pharmaceutical R&D and fine chemical synthesis teams focused on developing new therapeutic agents.

Application

• Pharmaceutical Intermediate: Serves as a core scaffold for the research and development of new drug candidates targeting various diseases.
• Medicinal Chemistry Research: Used in structure-activity relationship (SAR) studies to optimize the potency and selectivity of lead compounds.
• Kinase Inhibitor Synthesis: A key precursor in the synthesis of potential kinase inhibitors, a major class of targeted cancer therapies.
• Chemical Biology Probes: Employed in the creation of specialized molecular probes to study biological pathways and protein functions.
• Custom Synthesis Building Block: Provided to contract research and manufacturing organizations (CROs/CMOs) for custom synthesis projects.
• Academic Research: Utilized in university and institutional labs for exploratory organic synthesis and heterocyclic chemistry studies.

Basic Information

Product Name	Thieno[2,3-D]Pyrimidin-4(3H)-One, 6-Ethyl-3-(1-Methylethyl)- (9Ci)
CAS No.	686334-21-4
Molecular Formula	C11H14N2OS
Molecular Weight	222.31 g/mol
Synonyms	6-Ethyl-3-isopropylthieno[2,3-d]pyrimidin-4(3H)-one; 3-Isopropyl-6-ethylthieno[2,3-d]pyrimidin-4(3H)-one; 6-Ethyl-3-(propan-2-yl)-3H-thieno[2,3-d]pyrimidin-4-one; 686334-21-4; Thieno[2,3-d]pyrimidin-4(3H)-one, 6-ethyl-3-(1-methylethyl)-
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality management systems, ensuring batch-to-batch consistency and high purity for research applications. All materials are characterized and tested using advanced analytical techniques including HPLC, GC, NMR, and MS. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your regulatory and research documentation needs.

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). The compound may be light-sensitive; prolonged exposure to light should be avoided.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (HPLC)	Conforms to reference standard
Identification (IR)	Conforms to structure
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.