methyl (2S,3S,4S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-6-[(2S)-2-[tert-butyl(dimethyl)silyl]oxy-3-[(2R,3R)-3-[(E)-3-oxo-3-[(2R,4E,6E,8E)-10-oxodeca-4,6,8-trien-2-yl]oxyprop-1-enyl]oxiran-2-yl]propyl]-2-(3-dimethoxyphosphoryl-2-oxopropyl)-6-methoxyoxane-3-carboxylate 在
18-冠醚-6 、
potassium carbonate 作用下,
以
苯 为溶剂,
以58%的产率得到(8E,14E,16E,18E,20E)-(1R,3S,5R,7R,12R,24S,25S,26S)-3,26-Bis-(tert-butyl-dimethyl-silanyloxy)-1-methoxy-12-methyl-10,22-dioxo-6,11,28-trioxa-tricyclo[22.3.1.05,7]octacosa-8,14,16,18,20-pentaene-25-carboxylic acid methyl ester