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One-pot synthesis of pyrano[4,3-b]quinolinones from 2-alkynyl-3-formylquinolines via oxidative 6-endo-dig ring closure
- Source :
-
Tetrahedron Letters: International Organ for the Rapid Publication of Preliminary Communications in Organic Chemistry . Jan2012, Vol. 53 Issue 2, p235-238. 4p. - Publication Year :
- 2012
-
Abstract
- Abstract: A new regioselective one-pot procedure to synthesize pyranoquinolinones from readily available 2-alkynyl 3-formylquinolines under mild NaClO2/H2O2 conditions in good yields has been explored. This reaction sequence, involving oxidation followed by regioselective electrophilic 6-endo-dig cyclization is more efficient over the traditional Pd(0)-mediated synthesis. When scavenger-free conditions were used, unusual chlorinated furoquinolinone derivatives were obtained. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00404039
- Volume :
- 53
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Tetrahedron Letters: International Organ for the Rapid Publication of Preliminary Communications in Organic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 69738486
- Full Text :
- https://doi.org/10.1016/j.tetlet.2011.11.016