1: 62 percent / silver(I)carbonate, calcium sulphate / acetone / 3 h / Ambient temperature 2: 1.) phosphorus(V)oxide; 2.) sodium borohydride; 3.) pyridine / 1.) dimethyl sulfoxide, N,N-dimethylformamide, 2 h, 45-50 deg C; 2.) methanol, 30 min, r.t.; 3.) 16 h r.t. 3: 73 percent / sodium methoxide / methanol / 4 °C View Scheme

1: 62 percent / silver(I)carbonate, calcium sulphate / acetone / 3 h / Ambient temperature 2: 1.) phosphorus(V)oxide; 2.) sodium borohydride; 3.) pyridine / 1.) dimethyl sulfoxide, N,N-dimethylformamide, 2 h, 45-50 deg C; 2.) methanol, 30 min, r.t.; 3.) 16 h r.t. View Scheme

in benzene 17 h; Heating;

acetic acid

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1: 62 percent / silver(I)carbonate, calcium sulphate / acetone / 3 h / Ambient temperature 2: 64 percent / dimethylsulfoxide / 1.5 h / 40 °C View Scheme