6-amino-2-[2-(tert-butoxydimethylsiloxy)ethyl]-4H-benzo[1,4]oxazin-3-one 、
(E)-5,5-bis(4-trifluoromethylphenyl)-2,4-pentadienoic acid 在
tert-butoxydimethylsilyl 作用下,
以to give Compound 129的产率得到(E)-N-[2-(2-hydroxyethyl)-3-oxo-4H-benzo[1,4]oxazin-6-yl]-5,5-bis[4-(trifluoromethyl)phenyl]-2,4-pentadienamide