Ashcroft, William R.; Joule, John A., Heterocycles, 1981, vol. 16, # 11, p. 1883 - 1887
作者:Ashcroft, William R.、Joule, John A.
DOI:——
日期:——
ASHCROFT, W. R.;JOULE, J. A., HETEROCYCLES, 1981, 16, N 11, 1883-1887
作者:ASHCROFT, W. R.、JOULE, J. A.
DOI:——
日期:——
1,3-Dipolar character of six-membered aromatic rings. Part 49. 3-Oxido-1-(4-pyridyl)pyridinium, 3-oxido-1-(2-pyridyl)pyridinium, 3-oxido-1-(quinoxolin-2-yl)pyridinium, 3-oxido-1-(5,6-diphenyl-1,2,4-triazin-3-yl)pyridinium, and 3-oxido-1-(5-phenyl-1,2,4-triazin-3-yl)pyridinium
作者:Alan R. Katritzky、Anongrat Boonyarakvanich、Nicholas Dennis
DOI:10.1039/p19800000343
日期:——
and all add a variety of 2π, 4π, and/or 6π dipolarophiles. The regio- and stereo-chemistry of the addition are elucidated and rationalised. The pyridyl adducts undergo quaternisation and ring opening to tropolones.