In a large bowl combine the olive oil, vinegar, prunes, capers, olives, bay leaves, salt ,black pepper, oregano, and garlic cloves together to form the marinade.
Marinate the chicken pieces in the marinade overnight.
Preheat oven to 350ºF.
Place the chicken pieces into a 9x13 baking dish skin side up and spoon marinade over the top of the chicken.
Pour the white wine into the baking dish and sprinkle the brown sugar over the top of the chicken.
Bake uncovered for 20 minutes. Baste and bake for 20 minutes. Repeat one more time for a final 20 minutes.
Remove the chicken from the pan and pour the sauce into a saucepan. Bring to a boil.
Spoon the sauce over the chicken and serve.