1: With pyrrolidine; acetic acid in acetonitrile T=-10°C; 6 h; 2: With 2,3-dicyano-5,6-dichloro-p-benzoquinone in dichloromethane; acetonitrile T=30°C; 2 h;

1: With pyrrolidine; acetic acid in acetonitrile T=30°C; 6 h; 2: With 2,3-dicyano-5,6-dichloro-p-benzoquinone in dichloromethane; acetonitrile T=30°C; 2 h;

With  manganese(IV) oxide in  dichloromethane T=30°C; 2 h;