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Updated: Jun 1, 2026

Metal-free Synthesis of Ynones from Acyl Chlorides and Potassium Alkynyltrifluoroborate Salts
Published on: February 24, 2015
2,3-Dibromo-3-(2-bromo-phen-yl)-1-(3-phenyl-sydnon-4-yl)propan-1-one
Abstract:
IN THE TITLE COMPOUND [SYSTEMATIC NAME: 2,3-dibromo-3-(2-bromo-phen-yl)-1-(5-oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-yl)propan-1-one], C(17)H(11)Br(3)N(2)O(3), the oxadiazole ring is essentially planar, with a maximum deviation of 0.003 (1) Å. The -CHBr-CHBr- chain and bromo-phenyl ring are disordered over two sets of sites with a refined occupany ratio of 0.756 (5):0.244 (5). The central oxadiazole ring makes dihedral angles of 54.07 (11) and 13.76 (18)° with the attached phenyl and the major component of the bromo-substituted benzene rings, respectively. The dihedral angle between the major and minor components of the bromo-phenyl rings is 13.4 (5)°. In the crystal structure, mol-ecules are connected by C-H⋯O hydrogen bonds, forming [010] ribbons.
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