potassium carbonate; sodium chloride; tetrakis(triphenylphosphine) palladium(0) Suzuki reaction; 0.5 h;

(i) N2O4, AcOH, NaOAc, Ac2O, (ii) /BRN= 969212/; Multistep reaction;

hydrogenchloride; sodium acetate; sodium nitrite 1.) water, 1 h, 2.) water, a) 25 deg C, overnight, b) 34 deg C, 24 h, c) from 65 deg C to RT, overnight; Yield given. Multistep reaction;

triethyl phosphite 24 h; Heating;