Rauhut-Currier-Type Reaction with Morita-Baylis-Hillman Carbonates of 2-Cyclohexenone and Alkylidenemalononitriles To Access Chromene Derivatives

An assembly of MBH carbonates of cyclohexen-2-one and alkylidenemalononitriles was investigated by the catalysis of a tertiary amine, which efficiently provides aromatic chromene derivatives with dense functionalities through a domino Rauhut-Currier-type reaction, cyclization, and isomerization process under metal-free conditions.