1,2:3,4-di-O-isopropylidene-α-D-galactopyranoside 、
O,O-diethyl 3,4,6-tri-O-benzyl-2-O-pivaloyl-1-thio-α-D-glucopyranoside phosphorodithioate 在
4 Angstroems MS 、
三氟甲烷磺酸甲酯 作用下,
以
二氯甲烷 为溶剂,
反应 16.0h,
以70%的产率得到2,2-Dimethyl-propionic acid (2R,3R,4S,5R,6R)-4,5-bis-benzyloxy-6-benzyloxymethyl-2-((3aR,5R,5aS,8aR,8bR)-2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-ylmethoxy)-tetrahydro-pyran-3-yl ester