1,10-Phenanthroline → N-(4-Cyano-phenyl)-hydrazinecarboxylic Acid tert-butyl Ester

Participants

Reaction Conditions

Reaction Steps

Copper iodide (18 mg, 0.05 eq, 0.09 mmol), 1,10-phenanthroline (67 mg, 0.2 eq, 0.37 mmol) and caesium carbonate (0.84 g, 1.4 eq, 2.6 mmol) were mixed in a RB flask, placed under vacuum and purged with N2 (g). 4-iodo-benzonitrile (0.5 g, 1.0 eq, 1.85 mmol), hydrazine carboxylic acid tert-butyl ester (0.3 g, 1.2 eq, 2.22 mmol) and DMF (25 ml) were added to the mixture which was then heated to 80° C. with stirring under an inert atmosphere for 16 hours. The reaction mixture was allowed to cool and the solvent was removed in vacuo. The resultant residue was absorbed onto silica and purified by column chromatography using heptane/ethyl acetate (7:3) as eluent to yield the title compound as a pale orange solid (0.23 g, 1.0 mmol, 45%). LCMS: [M+H]+=234, rt=1.94 min, 97% purity.

Provenance & Evidence