Acetic acid (2S,3aS,5R,6R,7S,7aS)-6-acetoxy-5-acetoxymethyl-2-((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethoxy)-2-methyl-tetrahydro-[1,3]dioxolo[4,5-b]pyran-7-yl ester 在
三氟甲磺酸三甲基硅酯 4 A molecular sieve 作用下,
以
1,2-二氯乙烷 为溶剂,
以60%的产率得到3-O-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyl)-1,2-O-isopropylidene-sn-glycerol