1. Benzothiophene showed a strong competitive adsorption effect to thiophene.

2. Several new bis (1,2-dicarbonyl) compounds containing benzofuran or benzothiophene ring have been synthesized and identified by elemental analysis and Infra red spectroscopy.

3. Methods:Zileuton wassynthesized via 3-step reactions with 2-acetyl benzothiophene as the starting material.

4. The present invention relates to a novel class of hydroxamic acid derivatives having a benzothiophene or thiophene backbone .

5. In this work, the effect of textural property of activated carbons on desorption activation energy and adsorption capacity for benzothiophene was investigated.