SYNTHESIS AND CHARACTERIZATION OF CHIRAL CU(I) COMPLEXES WITH SUBSTITUTED-PYRROLIDINE-LIGANDS BEARING A TRIETHOXYSILYL GROUP AND PREPARATION OF HETEROGENIZED CATALYSTS ON USY-ZEOLITES

A series of new copper complexes of formula [Cu(L-L)(CH3CN)]X (X=ClO4, PF6) where L-L=(S)-2-R-pyrrolidine (1), (S)-1-R-2-t-butylaminocarbony lpyrrolidine (2), (S)-1-R-2-(1-naphthylaminocarbonyl)pyrrolidine (3), (S)-1-R-2-(1-naphthylaminome thyl)pyrrolidine (4), ,4S)-4-amino-1-R-2- t-butylaminocarbonylpyrrolidine (5) (R=(3-triethoxysilylpropyl)aminoca rbonyl) have been prepared, characterised and supported on a modified ultrastable Y-zeolite containing supermicropores by a covalent bond. T he complexes anchored on the zeolite are easily recycled and show a si milar catalytic activity to the free complexes in homogeneous medium f or cyclopropanations of olefins.