dienyl
Dienyl is a chemical term used in organic chemistry to designate a substituent that contains a conjugated diene fragment, typically a 1,3-diene. A dienyl group is formed by removing a hydrogen from a diene, resulting in a pi-rich substituent that can be attached to a parent molecule. The most common examples are butadienyl (derived from 1,3-butadiene) and pentadienyl (from 1,3-pentadiene); cyclic examples include cyclohexa-1,3-dienyl.
Nomenclature for dienyl groups follows the pattern of naming the underlying diene and appending the suffix
Dienyl groups are characterized by conjugation between the two double bonds, which influences their reactivity. They
In synthesis, dienyl fragments are used to extend conjugation, construct polyenes, or build complex structures in