tert-butyl ((3R,4R,5S)-1-(3-aminopyridin-4-yl)-4-{[tert-butyl(dimethyl)silyl]oxy}-5-methylpiperidin-3-yl)carbamate 、
6-(2,6-difluoro-4-vinylphenyl)-5-fluoropicolinic acid 在
水 、 NaCl(sat.) 、
magnesium sulfate 、 SiO2 作用下,
以
乙酸乙酯 为溶剂,
以tert-butyl (3R,4R,5S)-4-(tert-butyldimethylsilyloxy)-1-(3-(6-(2,6-difluoro-4-vinylphenyl)-5-fluoropicolinamido)pyridin-4-yl)-5-methylpiperidin-3-ylcarbamate was obtained in 67% yield的产率得到tert-butyl (3R,4R,5S)-4-(tert-butyldimethylsilyloxy)-1-(3-(6-(2,6-difluoro-4-vinylphenyl)-5-fluoropicolinamido)pyridin-4-yl)-5-methylpiperidin-3-ylcarbamate