Reactivity of 3-formyl- and 3-cyanothiochromones toward some N- and C-nucleophiles. Novel synthesis of 3-substituted 2-aminothiochromones
摘要:
The reactions of 3-formylthiochromone with o-phenylenediamines, o-aminobenzenethiol, and indoles proceeded at the aldehyde group to give 3-(benzimidazol-2-yl)thiochromone, 3-(benzothiazol-2-yl) thiochromone. and 3-di(indol-3-yl)methylthiochromones, respectively. 3-Formyl- and 3-cyanothiochromones react with primary aromatic amines and phenylhydrazine to give the corresponding anils and phenylhydrazones of 3-formyl- and 2-amino-3-formylthiochromones. The reaction of 3-cyanochromones with o-phenylenediamines gave 2-amino-3-[(2-aminophenyl)iminomethyl]-4H-chromen-4-ones. (C) 2010 Published by Elsevier Ltd.
Reactivity of 3-formyl- and 3-cyanothiochromones toward some N- and C-nucleophiles. Novel synthesis of 3-substituted 2-aminothiochromones
作者:Vyacheslav Ya. Sosnovskikh、Dmitri V. Sevenard、Vladimir S. Moshkin、Viktor O. Iaroshenko、Peter Langer
DOI:10.1016/j.tet.2010.06.066
日期:2010.9
The reactions of 3-formylthiochromone with o-phenylenediamines, o-aminobenzenethiol, and indoles proceeded at the aldehyde group to give 3-(benzimidazol-2-yl)thiochromone, 3-(benzothiazol-2-yl) thiochromone. and 3-di(indol-3-yl)methylthiochromones, respectively. 3-Formyl- and 3-cyanothiochromones react with primary aromatic amines and phenylhydrazine to give the corresponding anils and phenylhydrazones of 3-formyl- and 2-amino-3-formylthiochromones. The reaction of 3-cyanochromones with o-phenylenediamines gave 2-amino-3-[(2-aminophenyl)iminomethyl]-4H-chromen-4-ones. (C) 2010 Published by Elsevier Ltd.
Self-condensation of 3-cyanothiochromone upon the action of benzyl- and phenethylamine
作者:V. Ya. Sosnovskikh、D. V. Sevenard、V. S. Moshkin、O. S. El’tsov
DOI:10.1007/s11172-010-0373-z
日期:2010.11
Reflux of 3-cyanothiochromone with benzylamine in toluene afforded 17-benzyl-6,7,14,15-tetrahydro-7,15-epiminobis(8H,16H-dithiochromeno)[2,3-b:2′,3′-f][1,5]diazocine-6,14-dione, the self-condensation product of 2-amino-3-(benzyliminomethyl)thiochromone. Similar reaction with phenethylamine leads to 2-(thiochromon-3-yl)-5H-thiochromeno[2,3-d]-pyrimidin-5-one. Mechanism of formation of the dimeric products was considered.