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.