4-溴吡嗪氢溴酸 、 (2R,3R,4R,6R)-6-(3-(3-amino-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)picolinamido)pyridin-4-yl)-3-ethyl-3-hydroxy-2-methyltetrahydro-2H-pyran-4-yl acetate 以to give 3-amino-N-(4-((2R,4R,5S,6R)-5-ethyl-4,5-dihydroxy-6-methyltetrahydro-2H-pyran-2-yl)pyridin-3-yl)-6-(pyridazin-4-yl)picolinamide in 47% yield的产率得到3-amino-N-(4-((2R,4R,5S,6R)-5-ethyl-4,5-dihydroxy-6-methyltetrahydro-2H-pyran-2-yl)pyridin-3-yl)-6-(pyridazin-4-yl)picolinamide