(1S,2R,3S,4S,5R)-3-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-5-(tert-butyl-diphenyl-silanyloxymethyl)-1-methoxymethoxy-2-methyl-8-oxo-bicyclo[2.2.2]octane-2-carboxylic acid methyl ester 在
sodium tetrahydroborate 作用下,
以73%的产率得到(1S,2R,3S,4S,5R,8S)-3-[2-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-5-(tert-butyl-diphenyl-silanyloxymethyl)-8-hydroxy-1-methoxymethoxy-2-methyl-bicyclo[2.2.2]octane-2-carboxylic acid methyl ester