A catalyst, solvent, work-up and column free synthesis of chromenopyranpyrazoles via multicomponent cascade reaction has been achieved with high stereoselectivity. This novel reaction creates two N–C, two C–C and one O–C bonds through a domino process for the construction of three new rings and three contiguous stereogenic centers.
solvent-free intramolecular rearrangement sequence leading towards benzimidazole-tethered tetrasubstituted olefins through a solid-state melt reaction (SSMR) involving imine formation, cyclization, N-allylation and isomerization has been realized for the first time. Interestingly, only water is the byproduct in this novel quadruple domino reaction. Furthermore, the reaction is highly stereoselective, atom