哌啶 、
dimethyl 3,3'-(2,2'-((1R,2S,3R,4S)-bicyclo[2.2.1]hept-5-ene-2,3-diyl)bis(acetyl))(4R,4'R)-bis(2-thioxothiazolidine-4-carboxylate) 以
二氯甲烷 为溶剂,
反应 2.0h,
以43.8%的产率得到(R)-3-{2-[(1S,2R,3S,4R)-3-(2-Oxo-2-piperidin-1-yl-ethyl)-bicyclo[2.2.1]hept-5-en-2-yl]-acetyl}-2-thioxo-thiazolidine-4-carboxylic acid methyl ester