三氟甲磺酸酐 、 (3aR,7S,7aR)-4-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-7-hydroxy-2,2-dimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-6-one 在
吡啶 作用下,
以
二氯甲烷 为溶剂,
以95%的产率得到[(3aR,7S,7aS)-4-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-6-oxo-3a,4,7,7a-tetrahydro-[1,3]dioxolo[4,5-c]pyran-7-yl] trifluoromethanesulfonate