2-trimethylsilylethyl (1S,6S)-1-hydroxy-6-methyl-2,5-dioxocyclohex-3-ene-1-carboxylate 在
吡啶 、 camphor-10-sulfonic acid 作用下,
以
甲醇 、
氘代甲苯 为溶剂,
反应 12.0h,
生成 (2S,3S)-8-(tert-Butyl-dimethyl-silanyloxy)-2-hydroxy-3-methyl-1,4-dioxo-1,2,3,4-tetrahydro-anthracene-2-carboxylic acid 2-trimethylsilanyl-ethyl ester