(4R,5S)-(5-methyl-2,2-dimethyl-1,3-dioxolane-4-ylmethyl)-phosphonium iodide 、
6,7-anhydro-1,2:3,4-di-O-isopropylidene-α-L-erythro-D-galacto-octodialdo-1,5-pyranose 在
环氧乙烷 作用下,
以
二氯甲烷 为溶剂,
以10%的产率得到(3aR,5R,5aS,8aS,8bR)-2,2,7,7-Tetramethyl-5-{(2S,3S)-3-[(Z)-2-((4S,5S)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-vinyl]-oxiranyl}-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran