bei der Destillation;

1: propan-1-ol; carbon dioxide With 1,8-diazabicyclo[5.4.0]undec-7-ene in acetonitrile T=-42°C; 0.75 h; 2: trifluoromethanesulfonic anhydride in acetonitrile T=-20°C; 0.666667 h; Title compound not separated from byproducts;

potassium hydroxide; chloroform