Substantial formation of hydrates and hemiacetals from pyridinium ketones
作者:Sha Huang、Amanda K. Miller、Weiming Wu
DOI:10.1016/j.tetlet.2009.09.054
日期:2009.11
Pyridinium ketones have been found to exist as hydrates and hemiacetals in considerable amount in aqueous and alcoholic solutions, respectively. The relative position of the pyridinium positive charge has a large effect on the equilibrium constants. The polar substituent constants, σ∗, of the pyridinium group substituted at different positions can be estimated from the hydration constants.
Engler,C.; Rosumow, Chemische Berichte, 1891, vol. 24, p. 2527
作者:Engler,C.、Rosumow
DOI:——
日期:——
1-Alkyl-2-(carbomethoxy)pyridinyl radicals: monomers and dimers defined through chemical and photochemical properties and electron paramagnetic resonance
作者:Joshua Hermolin、Menachem Levin、Yusaku Ikegami、Masako Sawayanagi、Edward M. Kosower