烯丙基磷酸二乙酯 、
1-((1R)-((2R,4R,5S)-5-ethylquinuclidin-2-yl)(6-methoxyquinolin-4-yl)methoxy)-4-((1R)-((2R,4S,5R)-5-ethylquinuclidin-2-yl)(6-methoxyquinolin-4-yl)methoxy)phthalazine 、
benzyl ((4-chlorobenzoyl)oxy)carbamate 在
四氧化锇 benzyl 、 silica gel 作用下,
以Subsequent flash column chromatography (silica gel, petroleum spirit/ethyl acetate 3:7 and 0:1) gives 27a (275 mg, 47%) as a light-brown oil, 27b (20 mg, 3%) as a light-brown oil的产率得到