Butter bunt pan and pour pecans on the bottom. (About 1/2 cup or so). Quarter 3 to 4 cans biscuits (regular). Cut each biscuit into 4 pieces. Roll them in 1/2 cup sugar & 1 tablespoon of cinnamon mixture. (Or you can shake in a Tupperware container or plastic bag so each piece is covered in sugar mixture). Place pieces into bunt pan. Mix 1 1/2 sticks of butter and 1 1/2 cups of brown sugar. Melt in pan. Pour mixture evenly over biscuit pieces. Bake at 350 for 30 minutes. Turn over onto large serving dish.