N-(3-allyl-4-methoxy-2,5-bis-methoxymethoxyphenyl)-N-(4-tert-butyldimethylsiloxy-2-methoxybenzyl) (E)-3-C-allyl-1-(6-amino-N6-trityl-9H-purin-9-yl)-2-O-tert-butyldimethylsilyl-3,5,6-dideoxy-β-D-ribo-5-eneheptofuranuronamide 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
反应 7.0h,
以91%的产率得到(4E,6R,8R,9R,10R,12E)-9-[tert-butyl(dimethyl)silyl]oxy-2-[[4-[tert-butyl(dimethyl)silyl]oxy-2-methoxyphenyl]methyl]-16-methoxy-17,19-bis(methoxymethoxy)-8-[6-(tritylamino)purin-9-yl]-7-oxa-2-azatricyclo[13.3.1.06,10]nonadeca-1(18),4,12,15(19),16-pentaen-3-one