Bacon Buttermilk Pancakes with Caramelized Pineapple Sauce

Name: Bacon Buttermilk Pancakes with Caramelized Pineapple Sauce
Ingredients: 6 tablespoons unsalted butter; ½ cup firmly packed light brown sugar; 4 cups pineapple chunks, fresh or canned (drained); ½ cup pure maple syrup, plus extra; 22 slices hickory smoked uncured bacon; 2 cups unbleached all-purpose flour; 1/4 cup sugar; 2 teaspoons baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon salt; 2 cups buttermilk, at room temperature; 2 large eggs, at room temperature; 4 tablespoons unsalted butter, melted and slightly cooled; Extra butter for serving