Na2B4O7 in methanol 0.166667 h; Ambient temperature;

1: 60 percent / AlCl3 / CH2Cl2 / 3 h / 0 °C / 0 deg C to r. t. 2: 92 percent / aq. Borax / methanol / 0.17 h / Ambient temperature View Scheme

1: 18 percent / H2O / 17 h / 27 °C / G. candidum CBS 233-76 2: 95 percent / imidazole / dimethylformamide / 35 °C 3: 78 percent / n-butylamine, copper iodide / Pd<P(Ph3)>4 / benzene / 3 h / Ambient temperature 4: Bu4NF / tetrahydrofuran / 2 h / Ambient temperature 5: 85 percent 6: 65 percent / Zn, MeOH / H2O / 5 h / 30 °C 7: 95 percent / K2CO3 / methanol; H2O / Ambient temperature View Scheme