Butenoyl

Butenoyl refers to an acyl group derived from butenoic acid. Butenoic acid is a four-carbon carboxylic acid that contains a double bond. Depending on the position of the double bond, there are isomers of butenoic acid, namely 2-butenoic acid (also known as crotonic acid) and 3-butenoic acid. Consequently, butenoyl can also refer to acyl groups derived from these specific isomers. The 2-butenoyl group is derived from crotonic acid, while the 3-butenoyl group is derived from 3-butenoic acid. These groups are characterized by the presence of the carbonyl functional group (-CO-) attached to a three-carbon chain that includes a carbon-carbon double bond. The specific isomer of butenoyl is often implied by the context in which it is used, or explicitly stated. Butenoyl groups can be found as substituents in various organic molecules, including esters, amides, and other derivatives of butenoic acid. Their reactivity is influenced by both the carbonyl group and the double bond, allowing for participation in a range of chemical reactions.