(1R,6S,7R,8R,9R,13E,18R,20S,21S,22R)-6,7,8,9,21,22-hexamethoxy-20-phenyl-2,11,16,19-tetraoxa-4-azabicyclo[16.4.0]docos-13-en-3-one 、
碘甲烷 在
sodium hydride 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.5h,
以99%的产率得到(1R,6S,7R,8R,9R,13E,18R,20S,21S,22R)-6,7,8,9,21,22-hexamethoxy-4-methyl-20-phenyl-2,11,16,19-tetraoxa-4-azabicyclo[16.4.0]docos-13-en-3-one