title: Solvent-Free Green and Efficient One-Pot Synthesis of Dihydropyrano[3,2-c]chromene Derivatives.
abstract: A rapid, clean, and highly efficient method for synthesis of dihydropyrano[3,2-c]chromene derivatives by one-pot, three-component condensation of aromatic aldehydes, malononitrile, and 4-hydroxycoumarin using DABCO as catalyst in solvent-free neat conditions is described. The present method has the advantages of mild reaction conditions, short reaction times, easy isolation of products, and excellent yields.
authors.affiliation: School of Studies in Chemistry, Vikram University, Ujjain, Madhya Pradesh 456010, India.
authors.forename: Shubha
authors.initials: S
authors.lastname: Jain
authors.forename: Deepika
authors.initials: D
authors.lastname: Rajguru
authors.forename: Balwant S
authors.initials: BS
authors.lastname: Keshwal
authors.forename: Aman D
authors.initials: AD
authors.lastname: Acharya