1,1'-Carbonyldiimidazole → 5-(6-chloro-3-methoxy-1-trityl-1H-pyrazolo[4,3-c]pyridin-4-yl)-1,3,4-oxadiazol-2(3H)-one

Participants

Reaction Conditions

Reaction Steps

6-chloro-3-methoxy-1-trityl-1H-pyrazolo[4,3-c]pyridine-4-carbohydrazide (122 mg, 0.252 mmol) and CDI (49.1 mg, 0.303 mmol) were taken up in 1,4-dioxane (3.0 ml). The reaction mixture was stirred at 100° C. overnight. The reaction mixture was loaded onto silica gel and purification by MPLC 0-50% EtAOc/hexanes gave 5-(6-chloro-3-methoxy-1-trityl-1H-pyrazolo[4,3-c]pyridin-4-yl)-1,3,4-oxadiazol-2(3H)-one (53B). MS: [M+H]+ m/z 510.

Provenance & Evidence