In 2022,Lo, Chang-Lun; Akula, Pavan Sudheer; Hong, Bor-Cherng; Lee, Gene-Hsiang; Chien, Su-Ying published an article in Organic Letters. The title of the article was 《Total Synthesis of Ulodione A via a Double-Alkylation and DABCO Promoted Ring-Expansion Rearrangement Sequence》.COA of Formula: C7H13BrO2 The author mentioned the following in the article:
First total synthesis of ulodione A has been achieved via the key-step reactions of DIPEA-promoted dialkylation of 1,3-cyclopentadione with a bromonitroolefin and DABCO promoted/catalytic semipinacol-like ring-expansion rearrangement, with regioselective transformation of the nitrocyclohexane intermediates to their cyclopentenone counterparts via a sequence of reactions in a one-pot operation. Structures of six products were unequivocally established by X-ray crystallog. The results came from multiple reactions, including the reaction of Ethyl 5-bromovalerate(cas: 14660-52-7COA of Formula: C7H13BrO2)
Ethyl 5-bromovalerate(cas: 14660-52-7) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.COA of Formula: C7H13BrO2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary