1: (S)-2-methoxy-2-phenylpropionic acid methyl ester With sodium hydride in diethyl ether T=25°C; 1.5 h; 2: acetone in diethyl ether 1.58333 h;

1.1: sodium hydride / diethyl ether / 1.5 h / 25 °C 1.2: diethyl ether / 1.58 h 2.1: hydrazine monohydrate / ethanol / 0.5 h / Heating View Scheme