was added in one portion. The reaction mixture was allowed to warm to room temperature over a period of two hours. Next, the reaction mixture was diluted with CH2Cl2, and transferred to a separatory funnel. The organic layer was washed with saturated aqueous NaHCO3 solution, collected, dried over anhydrous Na2SO4, and concentrated under reduced pressure. The resulting residue was purified by chromatography on silica gel (specific conditions are associated with each product). Note: quantities are given for a 0.2 mmol reaction and are changed appropriately with changes in scale.