a) Diisopropylamine, n-BuLi, ethyl formate, THF, −78 °C; b) Ammonium hydroxide, 1,4-Dioxane, 60 °C; c) K3PO4, PdCl2(dppf)2. 4-Chlorophenylboronic acid, 1, 4-Dioxane/H2O, 85 °C (microwave); d) K3PO4, PdCl2(dppf)2. 4-Phenoxyphenyl boronic acid, 1, 4-Dioxane/H2O, 85 °C (microwave); e) 2-cyano-N-isopropylacetamide, DB U, THF, RT.