Hydrazine → HCID 58914783, compound

Participants

Reaction Steps

The Pthalimido Pyrrole 4 (1 eq) was dissolved in ethanol and hydrazine (3 eq) at room temperature under nitrogen. Upon heating to reflux, the reaction generated a white precipitate. Stir at reflux until complete (˜2 h) by TLC (CH2Cl2/acetonitrile (95:5 v/v), the UV active product was at Rf=0.2) and LCMS. Upon reaching completion, the reaction was allowed to cool to room temperature and the precipitate was vacuum-filtered off using a medium to fine cintered-glass filter. The filtrate was concentrated under reduced pressure to a gummy solid. The crude material was taken up in ethanol/EtOAc (1:1 v/v), stirred and the precipitate was filtered off in the same fashion as before. The filtrate was concentrated under reduced pressure and than dried in vacuo for 10-15 min. This process of adding ethanol/EtOAc, filtering and concentrating was done one more time or as needed to remove the majority of the white precipitate and residual hydrazine. The product was then dried in vacuo overnight. The material was used without further purification. Once dried, the reaction yielded the product as a glass (˜87% yield over 2 steps).

Provenance & Evidence