methanol; 9-borabicyclo[3.3.1]nonane dimer heating, 1 h; Yield given. Multistep reaction;

sodium tris(acetoxy)borohydride; acetic acid in 1,2-dichloro-ethane T=20°C; 1 h;

1: 2.) aq. HCl / 1.) 60 deg C, 6 h, 2.) r.t., 12 h; 60 deg C, 30 min 2: 90 percent / H2 / Pd-C / diethyl ether 3: 86 percent / p-Me-C6H4-SO3H / toluene / Heating View Scheme

1: 2.) aq. HCl / 1.) 60 deg C, 6 h, 2.) r.t., 12 h; 60 deg C, 30 min 2: 90 percent / H2 / Pd-C / diethyl ether View Scheme