((1S,2R,4S,7S)-2-hydroxy-bicyclo[2.2.1]hept-7-yl)-methyl-carbamic acid tert-butyl ester 、
2-羟基-2,2-二(噻吩-2-基)乙酸乙酯 在
sodium methylate 作用下,
以
甲苯 为溶剂,
以70%的产率得到hydroxy-di-thiophen-2-yl-acetic acid (1S,2R,4S,7S)-7-(tert-butoxycarbonyl-methyl-amino)-bicyclo[2.2.1]hept-2-yl ester