41681-14-5Relevant articles and documents
Reaction of 2-alkylthiopyridinium salts with active methylene compounds
Hoshino, Masato,Taguchi, Tsuyoshi,Nakano, Hiroto,Tomisawa, Hiroshi,Matsuzaki, Hisao,Fujita, Reiko
, p. 791 - 802 (2008/09/18)
Reactions between active methylene compounds and2-alkyllthio-l-alkylpyridinium iodides in the presence of sodium hydride, were found to occur at the 2 or 4-position. In contrast, 2-chloro-1-methylpyridiniumiodide reacted at the 2-position, whereas 6-chlor
PREPARATION AND STRUCTURE ELUCIDATION OF SOME N-ALKYLPYRAZINIUM SALTS AND THEIR N-OXIDES
Jovanovic, Misa V.
, p. 2299 - 2315 (2007/10/02)
Several N4-alkylpyrazinium N-oxide salts were prepared in high yields by heating the corresponding pyrazine N1-oxides in the presence of alkylating reagent and solvent.The proton nmr data point to the quinoidal nature of these compounds.Pyrazine di-N-oxides deoxygenated rapidly under same reaction conditions to yield a mixture of N-alkylpyrazinium and N-alkylpyrazinium mono-N-oxide salts.Mechanism is proposed to account for these reductive deoxygenations of the pyrazine nucleus.