Douglass, J. E.; Shih, H.-M.; Fraas, R. E., Journal of Heterocyclic Chemistry, 1970, vol. 7, p. 1185 - 1188
作者:Douglass, J. E.、Shih, H.-M.、Fraas, R. E.、Craigh, E. D.
DOI:——
日期:——
2,2′-Bipyridinium bis(perchlorate)
作者:Guibin Ma、Andrey Ilyukhin、Julius Glaser
DOI:10.1107/s0108270100012452
日期:2000.12.15
The title compound, [H(2)bipy](ClO4)(2) or C10H10N22+. 2ClO(4)(-), was obtained at the interface between an organic (2,2'-bipyridine in methanol) and an aqueous phase (perchloric acid in water). The compound crystallizes in space group P(1) over bar and comprises discrete diprotonated trans-bipyridinium cations, [H(2)bipy](2+), and ClO4- anions. The cations and anions are connected through N-H . . .O and C-H . . .O hydrogen bonds [distances N . . .O 2.817 (4) and 2.852 (4) Angstrom, and C . . .O 3.225 (6)-3.412 (5)Angstrom]. The C-C bond distance between the two rings is 1.452 (5) Angstrom. The bipyridinium cation has a trans conformation and the N-C-C-N torsion angle is 152.0 (3)degrees.
Dey, D.; Basu Baul, T. S.; Rivarola, E., Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1993, vol. 23, p. 1285 - 1298
作者:Dey, D.、Basu Baul, T. S.、Rivarola, E.
DOI:——
日期:——
[2,2'-Bipyridine]-1,1'-diium perchlorate as a new and efficient dicationic organic salt for the promotion of the synthesis of bis(4-hydroxycoumarin), 5-arylidene barbituric acid and pyrano[2,3-d]pyrimidinone derivatives in water
simple and convenient procedure for the synthesis of 5-arylidene barbituric acid, pyrano[2,3-d]pyrimidinone and 4-hydroxycoumarin derivatives using [H2-BiPyr][ClO4]2 as an efficient, easily producible and recyclable promoter is reported. All reactions were performed under mild conditions, and the requested products were obtained during the acceptable reaction times in high to excellent yields.