3-O-(4',5',6',8'-tetra-O-benzyl-1',2'-dideoxy-α-D-gluco-oct-1'-eno-3'-ulopyranosyl)-5,6-dideoxy-1,2-O-isopropylidene-α-D-xylo-hex-5-enofuranoside 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
以64%的产率得到2,3,4,6-tetra-O-benzyl-α-D-glucopyranosylspiro-1'-[(3'S,4'R,5'R,7'R)-4',5'-dihydroxy-4',5'-O-isopropylidene-2',6'-dioxa-bicyclo[3.4.0]non-8'-ene]