4-AMINO-1-BENZYLPIPERIDINE-4-CARBONITRILE

4-AMINO-1-BENZYLPIPERIDINE-4-CARBONITRILE Property

Boiling point:

358.0±42.0 °C(Predicted)

Density 

1.12±0.1 g/cm3(Predicted)

storage temp. 

under inert gas (nitrogen or Argon) at 2–8 °C

pka

6.22±0.10(Predicted)

Appearance

White to off-white Solid

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

4-AMINO-1-BENZYLPIPERIDINE-4-CARBONITRILE Chemical Properties,Usage,Production

Synthesis

Step A: Synthesis of 4-amino-1-benzylpiperidine-4-carbonitrile To a solution of ammonium chloride (17.3 g, 323 mmol) in water (200 mL) was sequentially added 25% ammonia (25 mL, 332 mmol) and 1-benzylpiperidin-4-one (11.43 g, 60 mmol). The resulting mixture was stirred at room temperature for 20 minutes, followed by the addition of sodium cyanide (14.7 g, 300 mmol) in batches over 15 minutes. The reaction mixture was stirred at room temperature for 24 hours and then partitioned between water (200 mL) and dichloromethane (2 x 200 mL). The organic phases were combined, dried with anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to give the crude product. The crude product was purified by fast column chromatography (silica gel, elution gradient: 50% ethyl acetate/heptane to 100% ethyl acetate) to afford 4-amino-1-benzylpiperidine-4-carbonitrile (6.15 g, 47% yield). 1H NMR (300 MHz, CDCl3) δ ppm: 1.69-1.86 (m, 4H), 2.00 (dt, J = 13.1, 2.1 Hz, 2H), 2.27-2.45 (m, 2H), 2.83 (dt, J = 12.4, 3.6 Hz, 2H), 3.55 (s, 2H), 7.21-7.39 (m. 5H); MS m/z 216 (M + H)+.

References

[1] ACS Combinatorial Science, 2016, vol. 18, # 6, p. 330 - 336
[2] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 14, p. 4719 - 4722
[3] Patent: WO2014/39769, 2014, A1. Location in patent: Page/Page column 286-287
[4] Patent: US2015/99730, 2015, A1. Location in patent: Paragraph 0723; 0724
[5] Patent: US2010/130506, 2010, A1. Location in patent: Page/Page column 108