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Lewis Acid-Promoted Ring-Contraction of 2,4,6,8-Tetrasubstituted 1,5-Diazacyclooctatetraenes to 2,4,6-Trisubstituted Pyridines.
- Source :
-
Organic Letters . 1/19/2018, Vol. 20 Issue 2, p485-488. 4p. - Publication Year :
- 2018
-
Abstract
- Ring-contraction of 2,4,6,8-tetrasubstituted 1,5-diazacyclooctatetraenes was highly efficiently promoted by Lewis acid such as TiCl4, affording 2,4,6-trisubstituted pyridines in excellent yields, along with release of a nitrile. A reaction mechanism involving a 6π electrocyclic ring-closing followed by a retro [2 + 2] cyclization of an 1-azetine moiety was supported by both experimental observations and density functional theory calculation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15237060
- Volume :
- 20
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Organic Letters
- Publication Type :
- Academic Journal
- Accession number :
- 137315148
- Full Text :
- https://doi.org/10.1021/acs.orglett.7b03917