Spring Oranges Pound Cake

Name: Spring Oranges Pound Cake
Ingredients: * 1/2 pound (2 stick) unsalted butter at room temperature; * 2 cup granulated sugar; * 4 extra large egg at room temperature; * 1/3 cup grated orange zest (3 large or 6 small orange); * 3 cup all purpose flour; * 1/2 tsp baking powder; * 1/2 tsp baking soda; * 1 tsp kosher salt; * 1/4 cup freshly squeezed orange juice; * 3/4 cup buttermilk, at room temperature; * 1 tsp pure vanilla extract; orange syrup; * 1/2 cup granulated sugar; * 1/2 cup freshly squeezed orange juice; glaze (optional); * 1 cup confectioner' sugar (icing sugar), sifted; * 1 1/2 tbsp freshly squeezed orange juice