potassium carbonate; tris-(dibenzylideneacetone)dipalladium(0); tri-cyclo-hexyl-phosphine in 1,4-dioxane; water T=70°C; 1 h; Inert atmosphere;

1: benzyl (4-(2-(2-methyltetrazol-5-yl)pyridin-5-yl)-3-fluorophenyl)carbamate With lithium hexamethyldisilazane in tetrahydrofuran T=20°C; 1.41667 h; Inert atmosphere; 2: (-)-(R)-glycidyl butyrate With N,N'-dimethyl-N,N'-propyleneurea in tetrahydrofuran T=20°C; 15 h; Inert atmospherecooling with ice;