5-endo-Trigonal cyclization of o-substituted gem-difluorostyrenes: syntheses of 2-fluorinated indoles, benzo[b]furans and benzo[b]thiophenes
- 1 January 1997
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 16,p. 1537-1538
- https://doi.org/10.1039/a703110f
Abstract
β,β-Difluorostyrenes bearing tosylamido, hydroxy ormethylsulfinyl groups at the o-position undergo intramol-ecular substitution of the nitrogen, oxygen or sulfur withloss of fluorine via a 5-endo-trigonal process leading to2-fluorinated heterocyclic systems in high yields.Keywords
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