(5-bromo-2-chloro-pyridin-3-yl)-acetic acid ethyl ester 、
2-(4,4,5,5-四甲基-1,3,2-二氧杂硼烷-2-基)-5-(三氟甲基)苯甲醛 以to provide [2-chloro-5-(2-formyl-4-trifluoromethyl-phenyl)-pyridin-3-yl]-acetic acid ethyl ester的产率得到[2-chloro-5-(2-formyl-4-trifluoromethyl-phenyl)-pyridin-3-yl]-acetic acid ethyl ester