Preheat oven to 350° Cut each biscuit into 4 pieces; shape into balls. Combine sugar and cinnamon. Roll each ball in cinnamon sugar. Arrange balls evenly in a generously greased 9- or 10-in. fluted tube pan. Sprinkle with remaining cinnamon sugar., Combine butter and brown sugar; pour over the top. Place tube pan on baking sheet; bake until dough is golden brown and cooked through, 35-45 minutes. Cool for 5 minutes before inverting bread onto a serving platter.