重氮甲烷 、 3,4-bis[dimethyl-(4-methylphenyl)silyl]-6-hydroxy-7-(2-methyl-1,3-dioxolan-2-yl)-5-(2-trimethylsilylethoxycarbonyl)heptanoic acid 以
乙醚 为溶剂,
以6%的产率得到(2R,3R,4S)-3,4-Bis-(dimethyl-p-tolyl-silanyl)-2-[(S)-1-hydroxy-2-(2-methyl-[1,3]dioxolan-2-yl)-ethyl]-hexanedioic acid 6-methyl ester 1-(2-trimethylsilanyl-ethyl) ester