Asymmetric Inverse-Electron-Demand Oxa-Diels-Alder Reaction of Allylic Ketones through Dienamine Catalysis

A remote β,γ-regioselective asymmetric inverse-electron-demand oxa-Diels-Alder reaction between allylic ketones and α-cyano-α,β-unsaturated ketones has been developed through induced extended dienamine catalysis of a cinchona-derived primary amine. A spectrum of densely substituted dihydropyran frameworks were efficiently produced with excellent enantioselectivity and fair to exclusive diastereoselectivity.

ZnO nanoparticle–β-cyclodextrin: a recyclable heterogeneous catalyst for the synthesis of 3-aryl-4H-benzo[1,4]thiazin-2-amine in water

ZnO nanoparticles and β-cyclodextrin was used as a green catalytic system for the synthesis of benzo[1,4]thiazin-2-amine via a one-pot, three-component reaction of an o-amino thiophenol, aldehydes and isocyanides in excellent yields at 60 °C in water.

S-Nanoparticle/SDS: an efficient and recyclable catalytic system for synthesis of substituted 4H-pyrido[1,2-a]pyrimidines in aqueous admicellar medium

A green protocol has been described for the synthesis of 4H-pyrido[1,2-a]pyrimidines under admicellar catalysis by S₈ NPs.

Ionic liquid/water mixture promoted organic transformations

Wet ILs constitutes a new class of solvents with their own new and interesting properties. The IL–water mixing makes it easy to control the properties of the solution and the formation of these ionic liquid mixtures increases synthetic flexibility.

Molecular iodine catalysed domino cyclization in aqueous medium: a simple and efficient synthetic route to 1,4-dihydropyridazines

An efficient protocol has been developed for the synthesis of dihydropyridazines using molecular iodine as green catalyst.