625820-77-1Relevant academic research and scientific papers
Synthesis and properties of substituted isoxazolo[3′,4′:4,5]- thieno[2,3-b]pyridines
Vasilin,Kaigorodova,Firgang,Krapivin
, p. 377 - 386 (2007/10/03)
We synthesized derivatives of a novel heterocyclic system, isoxazolo[3′,4′:4,5]thieno[2,3-b]pyridine by sequential conversions in three steps: isomerization of 2-(2-R-ethylthio-2-oxo)-3-pyridyl cyanides obtained by alkylation from substituted 3-cyano-2(1H)-pyridinethiones by α-halomethyl ketones in alkaline medium, to form 3-aminothieno[2,3-b] pyridines; diazotization of the amino group followed by nucleophilic substitution of the diazonium group by an azido group, bypassing the step of isolating the diazonium salts; and thermolysis of the azides formed.
Synthesis and properties of (thieno[2,3-b]pyridin-3-yl) iminotriphenylphosphoranes. Molecular structure of (2-benzoyl-4-methoxymethyl-6- methylthieno[2,3-b]pyridin-3-yl)iminotriphenylphosphorane
Kaigorodova,Vasilin,Lipunov,Zavodnik,Krapivin
, p. 1600 - 1608 (2007/10/03)
Iminophosphoranes containing a thieno[2,3-b]pyridine fragment were obtained through a sequence of reactions: 1) alkylation of 3-cyano-2(1H)-pyridinethiones in alkaline medium by an α-halocarbonyl compound with subsequent Thorpe-Ziegler cyclization of the
