Novel 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

Authors
Pawlas, J Vedso, P Jakobsen, P Huusfeldt, PO Begtrup, M
Citation
J. Pawlas et al., Novel 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, J ORG CHEM, 66(12), 2001, pp. 4214-4219
Citations number
24
Categorie Soggetti
Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
JOURNAL OF ORGANIC CHEMISTRY
ISSN journal
00223263 → ACNP
Volume
66
Issue
12
Year of publication
2001
Pages
4214 - 4219
Database
ISI
SICI code
0022-3263(20010615)66:12<4214:NAATFC>2.0.ZU;2-R
Abstract
4-Substituted pyrazolo[4,3-c] quinolines 4a-i and 6a-b were prepared from p yrazole 3 whereas 9-substituted pyrazolo [3,4-c]quinolines 9a-d and 17 were prepared from pyrazole 13 utilizing anionic annelation techniques. 1,4-Dih ydrochromeno[4,3-c] pyrazoles 7a-c were accessed from pyrazole 3, extending the method for the synthesis of 4a-i.