(1R,10R)-di((1'S,2'R,4'S,6'S,9'R)-2'-(4',9'-diphenyl-3',5',8',10'-tetraoxabicyclo<4.4.0>decyl))-1,11-ditrityl-3,6,8-trioxaundecane 在
silica gel 作用下,
以
苯 为溶剂,
反应 12.0h,
以21%的产率得到(R)-2-((2S,4R,4aR,6R,8aS)-2,6-Diphenyl-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl)-2-(2-{2-[(R)-1-((2S,4R,4aR,6R,8aS)-2,6-diphenyl-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl)-2-trityloxy-ethoxy]-ethoxy}-ethoxy)-ethanol