2,5-anhydro-1-deoxy-1,1-difluoro-3,4;6,7-di-O-isopropylidene-D-gulo-hept-1-enitol 、
(4R)-4-(bromomethyl)-2,2-bis(trifluoromethyl)-1,3-oxazolidin-5-one 在
偶氮二异丁腈 、
三正丁基氢锡 作用下,
以
苯 为溶剂,
以30%的产率得到(S)-4-{2-[(3aR,4S,6S,6aR)-6-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[3,4-d][1,3]dioxol-4-yl]-2,2-difluoro-ethyl}-2,2-bis-trifluoromethyl-oxazolidin-5-one