3β-(2-azido)ethoxycholest-5-ene 、
2-propynyl 2,3,4,6-tetra-O-acetyl-β-D-galactopyranoside 在
copper(l) iodide 作用下,
以
甲苯 为溶剂,
反应 2.0h,
以89%的产率得到[(2R,3S,4S,5R,6R)-3,4,5-triacetyloxy-6-[[1-[2-[[(3S,8S,9S,10R,13R,14S,17R)-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl]oxy]ethyl]triazol-4-yl]methoxy]oxan-2-yl]methyl acetate