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Heterodiene cycloadditions: Synthesis and oxidation of pyrano[3,2,b]indoles into spiro derivatives

Authors
Journal
Tetrahedron
0040-4020
Publisher
Elsevier
Publication Date
Volume
53
Issue
3
Identifiers
DOI: 10.1016/s0040-4020(96)01040-x

Abstract

Abstract 1-Acetyl-2-benzylidene-2,3-dihydroindol-3-ones reacted with vinyl ethers and vinyl thioethers to afford substituted pyrano[3,2- b]indoles; these compounds were oxidized, using Jones reagent, to spirolactones or to oxo acetals with m-CPBA in the presence of boron trifluoride.

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