二乙二醇双对甲苯磺酸酯 、
4,6-O-benzylidene-1-O-methyl-α-D-glucopyranoside 在
氢氧化钾 作用下,
以4.5%的产率得到(2R,4aR,6S,7R,8R,8aR)-6-Methoxy-8-(2-{2-[(2R,4aR,6S,7R,8S,8aR)-6-methoxy-2-phenyl-7-(2-vinyloxy-ethoxy)-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yloxy]-ethoxy}-ethoxy)-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-ol