Efficient selective synthesis of 2-substituted indoles from complex-base-promoted arynic cyclisations

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Catherine Kuehm-Caubère, Ivan Rodriguez, Bruno Pfeiffer, Pierre Renard and Paul Caubère


Abstract

2-Substituted indoles have been efficiently obtained by selective arynic cyclisation of halogenated aryl imines of methyl ketones in the presence of the complex-base NaNH2–ButONa and by PhCH2SH–AlCl3 opening of tetrahydrothiopyranoindoles also obtained from arynic cyclisation of imines.


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