Microporous polyurethane material for size selective heterogeneous catalysis of the Knoevenagel reaction.

The first polyurethane material which is microporous (BET surface area of 312 m2 g−1) is prepared by solvothermal synthesis and acts as highly efficient and recyclable heterogeneous catalyst in the Knoevenagel condensation showing size selectivity, and in the Henry reaction showing substrate selectivity under mild reaction conditions. [ABSTRACT FROM AUTHOR]