1: ethyl vinyl ether With tert.-butyl lithium in tetrahydrofuran; pentane T=-78 - -5°C; 1 h; 2: (E)-2-methyl-1-morpholin-4-yl-3-phenylprop-2-en-1-one in tetrahydrofuran; pentane T=-78°C; 1 h;

hydrogenchloride in water; acetone T=20°C; 72 h;