sentence: Petroleum has many thioethers in it as well.
sentences_before: Thioethers are important in biology. They are present in some amino acids.
sentences_after: Thioethers can be made in the laboratory by the reaction of a thiol with a base and an electrophile. They can do many interesting reactions. It is easy to oxidise them to sulfoxides and then sulfones.
concept_name: petroleum
headings: Thioether
categories: Functional groups Organosulfur compounds