(Z)-4,4,4-trifluoro-3-hydroxy-1-(4-trifluoromethoxy-phenyl)-but-2-en-1-one 、
3-amino-4-cyclopropyl-but-2-enoic acid ethyl ester 在
silica gel 、 ethyl acetate heptane 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以to give 242 mg (0.56 mmol, 41%) of the title compound as yellow oil的产率得到2-cyclopropylmethyl-6-(4-trifluoromethoxy-phenyl)-4-trifluoromethyl-nicotinic acid ethyl ester