2-(4-chlorophenyl)-5-methyl-4-oxo-2,3-dihydro-1H-thieno[3,4-d]pyrimidine-7-carboxylic acid ethyl ester

## 2-(4-Chlorophenyl)-5-methyl-4-oxo-2,3-dihydro-1H-thieno[3,4-d]pyrimidine-7-carboxylic acid ethyl ester

This is a long and complex chemical name, but it describes a specific molecule with a particular structure. Here's a breakdown of the name and its significance:

**Structure:** The name describes a molecule containing a **fused ring system** with a **thienopyrimidine core**. This core is a combination of a thiophene ring (a five-membered ring with a sulfur atom) and a pyrimidine ring (a six-membered ring with two nitrogen atoms).

**Substituents:** The name also indicates the presence of several **substituents** attached to this core:

* **2-(4-Chlorophenyl):** A 4-chlorophenyl group is attached at the 2-position of the thienopyrimidine core. This means a benzene ring with a chlorine atom at the 4-position is connected to the thienopyrimidine ring.
* **5-Methyl:** A methyl group (CH3) is attached at the 5-position.
* **4-oxo:** A carbonyl group (C=O) is attached at the 4-position.
* **2,3-dihydro:** The 2 and 3 positions of the pyrimidine ring are saturated, meaning they have two hydrogen atoms attached instead of a double bond.
* **1H:** A hydrogen atom is attached at the 1-position of the pyrimidine ring.
* **7-carboxylic acid ethyl ester:** This indicates a carboxyl group (-COOH) is attached at the 7-position of the thienopyrimidine core, and the carboxyl group is esterified with an ethyl group (-COOC2H5).

**Why is it important for research?**

This molecule, often referred to as a **thienopyrimidine derivative,** is important for research due to its potential **biological activity:**

* **Anti-cancer activity:** Thienopyrimidine derivatives have been shown to possess anti-cancer properties, potentially through various mechanisms such as inhibiting cell growth, inducing apoptosis (programmed cell death), and interfering with DNA replication. This specific compound has been studied for its potential as an anti-cancer drug.
* **Anti-inflammatory activity:** Thienopyrimidines also have shown potential anti-inflammatory effects. They may work by inhibiting the production of inflammatory mediators.
* **Antimicrobial activity:** Some thienopyrimidine derivatives have exhibited antimicrobial activity, which could lead to the development of new antibiotics.
* **Other therapeutic applications:** The specific molecule mentioned has been investigated for its potential in other areas like anti-viral activity.

**Research in progress:** Scientists are actively exploring the biological properties of this and related thienopyrimidine derivatives to understand their mechanisms of action and potential therapeutic applications. Ongoing research aims to:

* **Optimize its activity:** Researchers are working to modify the structure of this molecule to improve its potency, selectivity, and pharmacological properties.
* **Develop new drug candidates:** The goal is to develop new drugs based on this chemical scaffold to treat various diseases.
* **Understand its mechanisms:** Researchers are trying to elucidate the molecular mechanisms by which this molecule exerts its biological activity.

**In conclusion,** 2-(4-Chlorophenyl)-5-methyl-4-oxo-2,3-dihydro-1H-thieno[3,4-d]pyrimidine-7-carboxylic acid ethyl ester is a promising molecule for research due to its potential biological activity and its potential as a lead compound for the development of new drugs.