TY - JOUR
T1 - A new route to pyrazolo[3,4-c] and [4,3-c]pyridinones via heterocyclization of vic-substituted hydroxamic acids of acetylenylpyrazoles
AU - Mshvidobadze, Elena V.
AU - Vasilevsky, Sergei F.
AU - Elguero, Jose
PY - 2004/12/13
Y1 - 2004/12/13
N2 - We report in this paper the synthesis of 6-substituted pyrazolo[4,3-c] pyridin-4-ones, 6-substituted 5-hydroxypyrazolo[4,3-c]pyridin-6-ones, 5-substituted pyrazolo[3,4-c]pyridin-7-ones and 5-substituted 6-hydroxypyrazolo[3,4-c]pyridin-7-ones by heterocyclization of vic-acetylenylpyrazol-hydroxamic acids under the influence of copper(I) salt in dimethylformamide or with organic bases in butanol or methanol. Graphical Abstract
AB - We report in this paper the synthesis of 6-substituted pyrazolo[4,3-c] pyridin-4-ones, 6-substituted 5-hydroxypyrazolo[4,3-c]pyridin-6-ones, 5-substituted pyrazolo[3,4-c]pyridin-7-ones and 5-substituted 6-hydroxypyrazolo[3,4-c]pyridin-7-ones by heterocyclization of vic-acetylenylpyrazol-hydroxamic acids under the influence of copper(I) salt in dimethylformamide or with organic bases in butanol or methanol. Graphical Abstract
KW - Cross-coupling
KW - Hetarylacetylenes
KW - Heterocyclization
KW - Hydroxamic acids
KW - Pyrazolopyridines
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U2 - 10.1016/j.tet.2004.09.104
DO - 10.1016/j.tet.2004.09.104
M3 - Article
AN - SCOPUS:8444247447
VL - 60
SP - 11875
EP - 11878
JO - Tetrahedron
JF - Tetrahedron
SN - 0040-4020
IS - 51
ER -