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Unusual Lewis-acid catalyzed formal (3+3)-cycloaddition of azomethine imines and nitrones to N-vinylpyrroles
- Source :
- Tetrahedron. 73:671-680
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- The addition of Lewis acids change the reaction mechanism of the cycloaddition of N-vinylpyrroles with azomethine imine and C,N-diarylnitrones. The formal (3+3)-cycloaddition is observed instead of (3+2)-dipolar cycloaddition, which take place in the absence of catalysts. This unusual (3+3)-cycloaddition leads to heterocyclic compounds with pyrazolo[1,2-a]pyrrolo[1,2-d][1,2,4]triazine- and pyrrolo[2,1-d][1,2,5]oxadiazine cores, which are difficultly achievable by other methods.
Details
- ISSN :
- 00404020
- Volume :
- 73
- Database :
- OpenAIRE
- Journal :
- Tetrahedron
- Accession number :
- edsair.doi...........e1144c7b16d7a2f1aba4f21ab8ef78dd