1: EtN(i-Pr)2 / dimethylformamide / Ambient temperature 2: 95 percent / TEA / CH2Cl2 / 1 h / Ambient temperature 3: 99 percent / NaBH4 / ethanol / 1.5 h / Ambient temperature View Scheme

in ethanol; N,N-dimethyl-formamide Ambient temperature; Yield given. Yields of byproduct given;

sodium hydroxide in water; acetonitrile T=20°C; 24 h; Title compound not separated from byproducts;