(1R,10S,12S,16S,19R,20S,21S,22S)-3-[tert-butyl(dimethyl)silyl]oxy-14,15-dihydroxy-6-(methoxymethoxy)-5,10,12,14,16,20,22-heptamethyl-21-triethylsilyloxy-23-oxatricyclo[17.3.1.02,7]tricosa-2,4,6-trien-9-one 、
di(1H-imidazol-2-yl)methanethione 以
甲苯 为溶剂,
反应 2.0h,
以60%的产率得到(22R,23S,24S,25S,26R,5S,8S,10S)-16-((tert-butyldimethylsilyl)oxy)-13-(methoxymethoxy)-14,23,25,65,5,8,10-heptamethyl-62-thioxo-24-((triethylsilyl)oxy)-23,24,25,26-tetrahydro-22H-2(2,6)-pyrana-6(4,5)-dioxolana-1(1,2)-benzenacyclododecaphan-11-one