4774-18-9Relevant articles and documents
Regioselective addition of Grignard reagents to N-acylpyrazinium salts: Synthesis of substituted 1,2-dihydropyrazines and Δ5-2-oxopiperazines
St Hilaire, Valentine R.,Hopkins, William E.,Miller, Yenteeo S.,Dandepally, Srinivasa R.,Williams, Alfred L.
supporting information, p. 72 - 78 (2019/01/28)
The regioselective addition of Grignard reagents to mono- and disubstituted N-acylpyrazinium salts affording substituted 1,2-dihy-dropyrazines in modest to excellent yields (45–100%) is described. Under acidic conditions, these 1,2-dihydropyrazines can be converted to substituted Δ5-2-oxopiperazines providing a simple and efficient approach towards their preparation.
Synthesis of mono- and diaza-'pyridones' via stille coupling of alkoxystannanes
Smith, Charlotte L.,Hirschh?user, Christoph,Malcolm, Georgia K.,Nasrallah, Daniel J.,Gallagher, Timothy
, p. 1904 - 1908 (2014/08/18)
Various alkoxy-substituted heterocyclic stannanes provide access to the corresponding substituted 'pyridone' moieties via Stille cross-coupling. Both pyridyl and a series of diazinyl stannanes are prepared, and options for unmasking (via demethylation or debenzylation) of the pyridone unit are evaluated. Georg Thieme Verlag Stuttgart. New York.
Alkanesulfonate derivatives and their use as insecticides, acaricides or nematicides
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, (2008/06/13)
Disclosed herein is a compound of the formula: wherein Ar is pyridine ring, pyridazine ring, pyrimidine ring, pyrazine ring, isoquinoline ring or thiazole ring, and those rings may be substituted by 1?3 of substituents selected from the group consisting of halogen, C1 ?C4 -alkyl, C1 ?C4 -alkoxy, CF3 and nitro, R1 is C1 ?C8 -alkyl; C1 ?C7 -alkyl which is substituted by 1?3 of F, Cl or Br, C1 ?C4 -alkoxy or C1 ?C4 -alkylthio; C3 ?C7 -cycloalkyl which may be substituted by 1?4 of F, Cl or methyl; C3 ?C6 -cycloalkylmethyl which may be substituted by 1?4 of F, Cl, Br or methyl; allyl, propargyl, phenyl or benzyl; R2 is C1 ?C4 -alkyl which may be substituted by 1?3 of F or Cl, x is integer of 0, 1 or 2, excepting wherein Ar is pyridine ring which is substituted by R1 --S(O)x and --O--SO2 R2 at 2- and 6-position and the R1 is C1 ?C7 -alkyl and the pyridine ring is not further substituted or substituted by 1?3 of halogen.