(R)-2-((2R,4S,5S,6R)-6-{(1R,3R)-3-[(2R,4S,5S,6R)-6-((1R,2R)-2-Azido-1-hydroxy-1-methyl-butyl)-5-methyl-2-phenyl-[1,3]dioxan-4-yl]-1-hydroxy-1-methyl-butyl}-5-methyl-2-phenyl-[1,3]dioxan-4-yl)-thiopropionic acid S-pyridin-2-yl ester 在
2-巯基吡啶 、
4-二甲氨基吡啶 、 tin(ll) chloride 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以10%的产率得到(1S,2R,4R,5R,7R,9S,10R,13R,14R,15R,17R,19S,20S)-13-Ethyl-4,14-dihydroxy-2,4,10,14,19,20-hexamethyl-7,17-diphenyl-6,8,16,18-tetraoxa-12-aza-tricyclo[13.3.1.1
5,9]icosan-11-one