Description

2-Amino-5,6-Dihydro-4H-Cyclopenta[B]Thiophene-3-Carboxylic Acid Ethyl Ester is a high-value, fused-ring heterocyclic building block that serves as a critical intermediate in advanced organic synthesis. Its unique bicyclic structure, incorporating both thiophene and cyclopentane motifs, makes it indispensable for constructing complex molecular architectures with tailored electronic and steric properties. This compound is primarily sought after by pharmaceutical R&D and fine chemical manufacturers for the development of novel active pharmaceutical ingredients (APIs) and specialty agrochemicals.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, inflammation, and oncology.
• Agrochemical Synthesis: Building block for developing advanced herbicides, fungicides, and insecticides with improved efficacy and selectivity.
• Material Science Research: Used in the development of organic semiconductors, conductive polymers, and non-linear optical (NLO) materials due to its electron-rich thiophene core.
• Dye and Pigment Industry: Serves as a starting material for synthesizing specialized heterocyclic dyes and pigments.
• Academic & Contract Research: Essential reagent for methodological studies in organic chemistry and for creating bespoke compound libraries.

Basic Information

Product Name	2-Amino-5,6-Dihydro-4H-Cyclopenta[B]Thiophene-3-Carboxylic Acid Ethyl Ester
CAS No.	4815-29-6
Molecular Formula	C10H13NO2S
Molecular Weight	211.28 g/mol
Synonyms	Ethyl 2-Amino-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate; Ethyl 2-Amino-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate; 2-Amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic Acid Ethyl Ester; 3-Carbethoxy-2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene; 4815-29-6; AACT-3-Carboxylic Acid, Ethyl Ester
EINECS	Contact for details

Quality Control

Our production of 2-Amino-5,6-Dihydro-4H-Cyclopenta[B]Thiophene-3-Carboxylic Acid Ethyl Ester adheres to stringent in-process controls to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques including HPLC, GC-MS, and NMR for identity confirmation and impurity profiling. Certificates of Analysis (COA) detailing purity, assay, and related substances are provided with each shipment. Our quality system is designed to meet the rigorous standards required for pharmaceutical and advanced fine chemical applications.

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). Keep away from heat, sparks, and open flame. The compound is light-sensitive (store away from light) as indicated in its chemical properties.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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