Editing Group transfer reaction (section)

== Sub-categories of Group Transfer Reactions ==

=== [[Ene reaction|Ene Reaction]] ===
The ene reaction is one of the most common forms of group transfer reactions, where an allylic hydrogen is transferred to an alkene in a cyclic concerted mechanism. The ene reaction is further divided into subgroups including intramolecular ene, metallo-ene, and carbonyl ene reactions.<ref>{{Cite journal |last1=Mikami |first1=Koichi |last2=Shimizu |first2=Masaki |date=July 1992 |title=Asymmetric ene reactions in organic synthesis |url=https://pubs.acs.org/doi/abs/10.1021/cr00013a014 |journal=Chemical Reviews |language=en |volume=92 |issue=5 |pages=1021–1050 |doi=10.1021/cr00013a014 |issn=0009-2665|url-access=subscription }}</ref> The reverse reaction, commonly called the retro-ene reaction, can occur under high temperatures.<ref name=":0" />
[[File:Figure1newene.png|none|thumb|356x356px|''Figure 2''. Generic ene reaction.]]

=== [[Reductions with diimide|Reductions with Diimide]] ===
Reductions with diimide is another class of group transfer reactions, in which alkenes and alkynes are reduced concertedly with diimide as the reducing agent. In the generic mechanism of a reduction with diimide ''(Figure 3)'', nitrogen gas is lost as a result. The diimide reduction displays a higher selectivity for the symmetrical homonuclear C=C double bond compared to the heteronuclear C=O double bond. Along with a preference for reducing the least conjugated double bond, showcasing the precision of reductions with diimides in targeted organic synthesis.<ref name=":5">{{Citation |last=Mandal |first=Dipak K. |title=Chapter 10 - Group Transfer Reactions |date=2018-01-01 |url=https://www.sciencedirect.com/science/article/pii/B9780128149584000106 |work=Pericyclic Chemistry |pages=431–460 |editor-last=Mandal |editor-first=Dipak K. |access-date=2023-11-05 |publisher=Elsevier |isbn=978-0-12-814958-4}}</ref>
[[File:Reduction_diimide.png|none|thumb|368x368px|''Figure 3.'' Generic mechanism of a reduction with diimide adapted from Mandal<ref name=":5" />.]]