Intramolecular Acetyl Transfer to Olefins by Catalytic C-C Bond Activation of Unstrained Ketones was written by Rong, Zi-Qiang;Lim, Hee Nam;Dong, Guangbin. And the article was included in Angewandte Chemie, International Edition in 2018.SDS of cas: 85118-24-7 This article mentions the following:
A rhodium-catalyzed intramol. acetyl-group transfer was achieved through a “cut and sew” process. The challenge arises from the existence of different competitive pathways. Preliminary success was achieved with unstrained enones that contain a biaryl linker. The use of an electron-rich N-heterocyclic carbene (NHC) ligand is effective to inhibit undesired β-hydrogen elimination. Various 9,10-dihydrophenanthrene derivatives can be prepared with excellent functional-group compatibility. The 13C-labeling study suggests that the reaction begins with cleavage of the unstrained C-C bond, followed by migratory insertion and reductive elimination. In the experiment, the researchers used many compounds, for example, 2-Bromo-4-(trifluoromethyl)benzaldehyde (cas: 85118-24-7SDS of cas: 85118-24-7).
2-Bromo-4-(trifluoromethyl)benzaldehyde (cas: 85118-24-7) belongs to organobromine compounds. 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. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. SDS of cas: 85118-24-7
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary