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Synthesis 2005(12): 2039-2045
DOI: 10.1055/s-2005-869908
DOI: 10.1055/s-2005-869908
PAPER
© Georg Thieme Verlag Stuttgart · New York
A Novel One-Pot, Three-Component Access to Hexahydropyrrolo[2,1-a]isoquinolines by an Alkylation-Dehydrohalogenation-1,3-Dipolar Cycloaddition Sequence
Weitere Informationen
Received
6 January 2005
Publikationsdatum:
19. Mai 2005 (online)
Publikationsverlauf
Publikationsdatum:
19. Mai 2005 (online)
Abstract
A simple one-pot process for the alkylation of isoquinolines followed by a dehydrohalogenation of the quaternary salts formed and by an in situ trapping of azomethine ylides with appropriate dipolarophiles is described. This method has successfully been applied to the synthesis of benz[5,6]azepino[2,1-a]isoquinolines and 5,6-dihydroindazolo[3,2-a]isoquinoline 8-oxides via an 1,7-electrocyclization process of similar type azomethine ylides.
Key words
cycloadditions - electrocyclic reactions - heterocycles - tandem reactions - ylides
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