Hydrazine hydrate (1:1) → HCID 22046712, compound

Participants

Reaction Steps

Hydrazine hydrate (2.31 g, 72.2 mmol) was added dropwise to a solution of 125 (6.01 g, 14.4 mmol) in methanol (60 mL) gently refluxing over Raney nickel (1.1 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 produc as a brown oil (3.97 g, 10.3 mmol, 73%): 1H NMR (270 MHz, CDCl3) δ 1.6-2.2 (m, 4H), 3.5-3.8 (m, 4H), 3.8 (s, 3H), 3.9 (s, 3H), 4.4 (br s, 1H), 5.1 (s, 2H), 6.6 (s, 1H), 7.3-7.6 (m, 5H); 13C NMR (67.8 MHz, CDCl3) δ 171.5, 144.9, 143.5, 141.9, 137.5, 134.6, 128.6, 128.5, 128.3, 128.2, 128.0, 115.1, 107.3, 75.1, 66.9, 61.0, 60.6, 60.4, 56.9, 50.9, 28.5, 24.9, 21.1, 14.2.

Provenance & Evidence