Preheat oven to 325 degrees. Grease Bundt pan or tube cake pan. Cut biscuits into fourths. In a separate bowl combine the sugar and cinnamon. Roll biscuit pieces into the cinnamon sugar mixture and place the pieces into the prepared pan. Combine melted butter with brown sugar. Pour over biscuits in pan. Bake at 325 degrees for 45 minutes or until golden brown. Let cool for 10 minutes, then invert pan. Pull apart and eat.