1: With sodium methylate in tetrahydrofuran; methanol T=20°C; 22.1667 h; 2: With sodium hydroxide; water in tetrahydrofuran; methanol T=55°C; 1.75 h; 3: With acetic acid in toluene pH=5; 0.25 h;

1: With sodium methylate in tetrahydrofuran; methanol T=20°C; 22.1667 h; 2: With sodium hydroxide; water in tetrahydrofuran; methanol T=55°C; 1.75 h; 3: With acetic acid in toluene pH=5; 0.25 h;