Das, Biswanath published the artcileCopper-catalyzed coupling of imidazoles and pyrazoles with 1,1-dibromo-1-alkenes: a distinct approach for direct N-alkynylation of heteroarenes, SDS of cas: 25753-84-8, the publication is Tetrahedron Letters (2011), 52(48), 6497-6500, database is CAplus.
The direct N-alkynylation of heteroarenes, imidazoles, and pyrazoles with 1,1-dibromo-1-alkene has been carried out using [Cu(Phen)PPh3Br] as catalyst and Cs2CO3 in DMSO at 80°. The products are formed in good to high yields (66-85%) within 3 h and the target compounds thus formed included 1-(2-phenylethynyl)-1H-benzimidazole, 1-(2-phenylethynyl)-1H-imidazole, 1-(2-phenylethynyl)-1H-pyrazole derivatives No side products could be detected.
Tetrahedron Letters published new progress about 25753-84-8. 25753-84-8 belongs to bromides-buliding-blocks, auxiliary class Copper, name is Bromo(1,10-phenanthroline)(triphenylphosphine)copper(I), and the molecular formula is C30H24BrCuN2P, SDS of cas: 25753-84-8.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary