Hydrazine hydrate (1:1) → HCID 71270800, compound

Participants

Reaction Steps

To a mixture of malononitrile (1.32 g, 20 mmol) in Ethanol (50 mL) and Water (2.50 mL) was added 1-naphthalenecarbaldehyde (3.12 g, 20 mmol). The reaction was stirred at rt for 7 days. The mixture was cooled to 0° C. in an ice bath. Sodium borohydride (0.204 g, 5.40 mmol) was introduced to the vigorously stirred mixture and the reduction was complete in about 10 min. To the reaction mixture was added water (20 mL). 1N HCl was added in to quench the excess hydride. More water was added in until precipitation was complete. Filtration gave (1-naphthalenylmethyl)propanedinitrile (3.3 g, 80%). To a solution of (1-naphthalenylmethyl)propanedinitrile (3.3 g, 16 mmol) in Ethanol (80 mL) was added hydrazine hydrate (0.785 mL, 16.00 mmol). The mixture was heated at reflux temperature for 8 h. The reaction mixture was concentrated. The crude material was purified on a silica column (MeOH/DCM: 0˜10%) to give the product (2.18 g, 57%). 1H NMR (400 MHz, DMSO-d6) δ ppm 3.96 (s, 2H) 7.26 (d, J=7.07 Hz, 1H) 7.31-7.44 (m, 1H) 7.45-7.58 (m, 2H) 7.74 (d, J=8.08 Hz, 1H) 7.85-7.97 (m, 1H) 8.12-8.26 (m, 1H) 10.05 (bs, 1H). LC/MS: MS (ES+) m/e 239.0 [M+H]+.

Provenance & Evidence