Michael addition of 1,3-dicarbonyls with various Michael acceptors has been found
to be catalyzed by commercially available, user-friendly and recyclable N-phenyl-tris(di-methylamino)iminophosphorane immobilized on polystyrene resin (P-BEMP).
The reaction does not require anhydrous solvents or inert atmosphere and proceeds
smoothly at room temperature leading to the corresponding adducts, which can be conveniently
isolated in high yield and with high chemical purity by simple filtration.
1,3-dicarbonyls - heterogeneous catalysis - Michael addition - polymer supported iminophosphoranes