Methanesulfonic acid (S)-1-methanesulfonyloxymethyl-2-[(2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-2-((2R,3R,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-ylethynyl)-tetrahydro-pyran-2-yl]-ethyl ester 在
sodium azide 、
15-冠醚-5 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以5%的产率得到methyl (5R)-5-C-{[2R-(2α(6'S*),3α,4β,5α,6β)]-3,4,5-tribenzyloxy-6-benzyloxy-methyl-3,4,5,6,6',7'-hexahydro-6'-(methanesulfonyloxy)spiro[2H-pyran-2,4'(5'H)-[1,2,3]-triazolo[1,5-a]pyridine]3'-yl}-2,3,4-tri-O-benzyl-α-D-xylopyranoside