potassium carbonate in methanol T=5 - 10°C; 1 h;

1: 75 percent / K2CO3 / methanol / 1 h / 5 - 10 °C 2: 77 percent / tetrabromomethane, pyridine, triphenylphosphine / tetrahydrofuran / 1.) from 5 deg C to 10 deg C, 1 h, 2.) 25 deg C, 2 h View Scheme

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