Baylis–Hillman carbonates in organic synthesis: a convenient one-pot strategy for nitrone–spiro-oxindole frameworks

A facile one-pot protocol for synthesis of nitrone–spiro-oxindole frameworks via alkylation of nitromethane with carbonates of Baylis–Hillman alcohols, derived from isatins and cyclohex-2-enone derivatives, followed by reductive cyclization is described.