?-Ketoaldehydes in the synthesis of 6-alkyl-3-cyano-2(1H)-pyridinethiones
摘要:
An efficient synthesis of 6-alkyl-3-cyano-2(1H)-pyridinethiones by the reactions of the sodium salts of beta-ketoaldehydes with cyanothioacetamide was developed. Pyridinethiones undergo selective S-alkylation with haloacetonitriles and haloacetophenones followed by cyclization to the corresponding thieno[2,3-b] pyridines.
Synthesis of 2-alkyl-2-(3-cyanopyridin-2-ylthio)propionic acids
作者:V. K. Zav’alova、A. A. Zubarev、V. P. Litvinov
DOI:10.1007/s11172-007-0317-4
日期:2007.10
Derivatives of 2-alkyl-2-mercaptopropionic acid were synthesized based on the substituted 3-cyanopyridin-2(1H)-thiones. The synthesis was carried out by the heating of a mixture of thione, alkyl methyl ketone, and chloroform in the presence of a base. The reaction proceeds readily for acetone, whereas alkyl methyl ketones require a prolonged heating in the presence of a phase-transfer catalyst. Methyl
Reaction of 3-cyanopyridine-2(1H)-thiones with N-butyllithium
作者:N. G. Frolova、V. K. Zav'yalova、V. P. Litvinov
DOI:10.1007/bf01165448
日期:1996.2
?-Ketoaldehydes in the synthesis of 6-alkyl-3-cyano-2(1H)-pyridinethiones
作者:N. G. Frolova、V. K. Zav'yalova、V. P. Litvinov
DOI:10.1007/bf00698508
日期:1995.4
An efficient synthesis of 6-alkyl-3-cyano-2(1H)-pyridinethiones by the reactions of the sodium salts of beta-ketoaldehydes with cyanothioacetamide was developed. Pyridinethiones undergo selective S-alkylation with haloacetonitriles and haloacetophenones followed by cyclization to the corresponding thieno[2,3-b] pyridines.
Synthesis of 6-methyl-3-cyano-5-ethylpyridine-2(IH)thione and condensed heterocycles based on this compound
作者:L. A. Rodinovskaya、A. M. Shestopalov、E. V. Belukhina、V. P. Litvinov