Hydrazine hydrate (1:1) → HCID 54431991, compound

Participants

Reaction Steps

Hydrazine hydrate (1.26 g, 39.37 mmol) was added dropwise to a solution of 190 (2.13 g, 6.56 mmol) in methanol (50 mL) gently refluxing over Raney nickel (1 g, slurry). The resulting vigorous evolution of hydrogen gas subsided after approximately 10 minutes and the reaction was deemed to be complete by TLC after 2 h. The reaction mixture was filtered through celite and the solvent evaporated. Distilled water (100 mL) was added to the residue, and the aqueous mixture was extracted with EtOAc (3×100 mL) and the combined organic phase washed with H2O (3×100 mL) and brine (3×100 mL) and dried over anhydrous MgSO4. Evaporation of the solvent afforded the product as a brown glass (191) (1.91 g, 6.50 mmol) which was protected directly as the troc-carbamate.

Provenance & Evidence