rose bengal; triphenylphosphine 1.) 8 h, iso-PrOH, sunlight; 2.) Et2O, 30 min.; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

rose bengal; copper(l) chloride; sodium sulfite 1.) i-PrOH, 12 h, sunlight, 2.) MeOH, pyridine, 24 h, room temperature; Yield given. Multistep reaction. Yields of byproduct given;