In a small saucepan, mix first nine ingredients; bring to a boil over medium heat. Reduce heat; simmer, uncovered, until slightly thickened, about 10 minutes, stirring occasionally. Reserve 1/4 cup sauce for serving.
Using a mortar and pestle or spice grinder, crush seasonings with brown sugar. Rub mixture over chops.
Place chops on an oiled grill over medium heat. Grill, covered, until a thermometer reads 145°, 5-6 minutes per side, brushing top with remaining sauce after turning. Let stand 5 minutes before serving. Serve with reserved sauce.