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Download fileNovel Anionic Annelation Tactics for Construction of Fused Heteroaromatic Frameworks. 1. Synthesis of 4-Substituted Pyrazolo[4,3-c]quinolines, 9-Substituted Pyrazolo[3,4-c]quinolines, and 1,4-Dihydrochromeno[4,3-c]pyrazoles
journal contribution
posted on 2001-05-16, 00:00 authored by Jan Pawlas, Per Vedsø, Palle Jakobsen, Per Olaf Huusfeldt, Mikael Begtrup4-Substituted pyrazolo[4,3-c]quinolines 4a−i and 6a−b were prepared from pyrazole 3 whereas
9-substituted pyrazolo[3,4-c]quinolines 9a−d and 17 were prepared from pyrazole 13 utilizing
anionic annelation techniques. 1,4-Dihydrochromeno[4,3-c]pyrazoles 7a−c were accessed from
pyrazole 3, extending the method for the synthesis of 4a−i.