(3R,S)-3,4-benzylidenedioxybutyl 2,3,4,6-tetra-O-acetyl-1-thio-α-D-glucopyranoside 在
N-溴代丁二酰亚胺(NBS) 、
sodium methylate 、
barium carbonate 作用下,
以
二氯甲烷 为溶剂,
反应 13.5h,
生成 Benzoic acid 1-((2R,3S,4R,5R,6S)-4,5-dihydroxy-2-hydroxymethyl-6-methoxy-tetrahydro-pyran-3-ylsulfanylmethyl)-3-((2R,3R,4S,5R,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-ylsulfanyl)-propyl ester