1: cyclohexenon; diethylzinc With copper(I) thiophene-2-carboxylate; chiral 2,2'-biphenyl-derived (R,R)-phosphine ligand in diethyl ether; hexane T=-30°C; 0.333333 h; 2: 1-(3-bromo-prop-1-ene-2-sulfonyl)-4-methyl-benzene in diethyl ether; hexane T=20°C; 7 h;