Zn(L -proline)2 as a powerful and reusable organometallic catalyst for the very fast synthesis of 2-amino-4H-benzo[g]chromene derivatives under solvent-free conditions

Article abstract of DOI:10.1002/aoc.3306

An efficient route for the synthesis of 2-amino-4H-benzo[g]chromenes via a three-component coupling reaction of aldehydes, malononitrile and 2-hydroxy-1,4-naphthaquinone in the presence of Zn(L-proline)₂ is reported. High yields, short reaction