The treatment of pyrrolidine （C4HsNI-I） with sequentially trimethylaluminum andcarbodiimide CyN--C=NCy in a molar ratio of 1 ：1：1 in the presence of O2 afforded a newguanidinatoaluminurn complex, [{（C4HsN）C（NCy）2}AIMe（/I-OMe）]2 （1）, which was characterizedby elemental analyses, 1H, 13C NMR spectra and single-crystal X-ray diffraction analysis. ComplexI crystallizes in monoclinic, space group P21/c with a = 9.8330（9）, b = 8.5786（8）, c = 24.159（2） A,β= 92.927（2）°, V= 2035.3（3） A3, Dc = 1.141 g cm^-3, F（000） = 768 and μ= 0.110 mm^-l. In addition,complex 1 was used to catalyze the Meerwein-Ponndorf-Verley （MPV） reduction and 1 as apre-catalyst at low catalyst loadings （5 tool%） exhibited good catalytic activity for the reduction ofa series of aldehydes to the corresponding alcohols in good yields （cony. up to 99%）.
