Hétérocycles mixtes

<p>4H-Cyclopenta[2,1-b:3,4-b']dithiophene is a molecule that has been shown to be photovoltaic. It has an optical absorption spectrum that peaks in the UV region and is able to absorb light from 300 to 400 nm. 4H-Cyclopenta[2,1-b:3,4-b']dithiophene can be fabricated into devices by means of cyclic voltammetry or other techniques. As a result of its high electron mobility and its ability to absorb visible light, this molecule may lead to high efficiency solar cells. Photovoltaic devices made with 4H-Cyclopenta[2,1-b:3,4-b']dithiophene have been shown to have efficiencies as high as 2%.</p>

<p>3-Ethoxy-1,2,4-dithiazolidine-5-one (3ED) is a small molecule that has been shown to have potent antitumor activity against multiple tumor types. It is a selective inhibitor of epidermal growth factor receptor (EGFR) that can be used in combination with chemotherapy or radiation therapy. 3ED has also been shown to inhibit the growth of bladder cancer cells and cervical cancer cells by affecting the EGFR pathway. In addition, 3ED inhibits the proliferation of human urothelial carcinoma cells through its inhibition of the EGFR pathway and can be used as an adjuvant treatment for patients with nonmetastatic bladder cancer and patients with locally advanced or metastatic urothelial carcinoma. 3ED also inhibits creatine kinase, which is an enzyme important in maintaining the health of the detrusor muscle in the urinary bladder and could potentially be used to treat overactive bladder disease.</p>

<p>Ethyl 2-amino-4-methylthiophene-3-carboxylate (EMTC) is a cytotoxic agent. It inhibits the HIV virus by interfering with the synthesis of viral proteins. EMTC has been shown to be effective against cancer cells, but not against healthy cells. The cytotoxic effect of EMTC is related to its ability to inhibit DNA synthesis and RNA transcription in both normal and cancer cells, which leads to cell death.</p>

<p>Used for preparation of pentathiophene amide</p>