The catalytic activity of a simple aminoalcohol that contains a bulky super silyl group [i.e., tris(trimethylsilyl)silyl (TTMSS)] bonded to the oxygen atom at the γ-position along with a primary amine moiety was examined in the enantioselective1,3-dipolarcycloaddition of nitrones to α,β-unsaturatedaldehydes. The organocatalyst successfully provided optically active isoxazolidines in good chemical
AbstractA 1,3‐dipolar azide–alkyne cycloaddition has been used to prepare a magnetic nanoparticle immobilized MacMillan catalyst that catalyzes the enantioselective 1,3‐dipolar cycloaddition between nitrones and α,β‐unsaturated aldehydes. The catalyst can be recovered and recycled for five consecutive runs without any significant loss in yields and diastereo‐ and enantioselectivities of the isoxazolidines.magnified image