4-(benzyloxy)-1H-pyrazolo[4,3-c]pyridin-3-amine 、 tert-butyl 5-(cyanomethylene)tetrahydro-2H-pyran-2-carboxylate 、
1,8-二氮杂双环[5.4.0]十一碳-7-烯 在
silica 、
乙酸乙酯 、 hexanes 作用下,
以
乙腈 为溶剂,
反应 72.0h,
以Concentration of the desired fractions afforded tert-butyl 5-(3-amino-4-(benzyloxy)-1H-pyrazolo[4,3-c]pyridin-1-yl)-5-(cyanomethyl)tetrahydro-2H-pyran-2-carboxylate (Distereomer 1 and 2=3:1)的产率得到tert-butyl 5-(3-amino-4-(benzyloxy)-1H-pyrazolo[4,3-c]pyridin-1-yl)-5-(cyanomethyl)tetrahydro-2H-pyran-2-carboxylate