Given that our complex exhibits activity comparable to or exceeding that of the benchmark complex Ru5 and achieves excellent selectivity with a (Z):(E) ratio higher than 95:5, we proceeded to investigate the cross-metathesis reactions involving more complex polyfunctional substrates (Scheme 3). The reaction of the protected 4-allyl-2-azetidinone derivative 2d with (Z)-1,4-diacetoxy-2-butene (3b) produced the desired product 4db with moderate yields and perfect selectivity for both complexes tested.