Yellowish Powder 1-Phenyl-2-Nitropropene (P2NP) China Best Supplier 705-60-2
Product Description
Yellowish Powder 1-Phenyl-2-Nitropropene (P2NP) from China Best Supplier
1-Phenyl-2-nitropropene (P2NP)
CAS: 705-60-2
Molecular Formula: C9H9NO2
Molecular Weight: 163.17
Melting Point: 64-66o C
Package: Foil bag or tin, or as you require.
Appearance: Yellowish Powder
Usage: It can be reduced in the presence of a catalyst .
Phenyl-2-nitropropene is a chemical compound with the chemical formula is C9H9NO2. It can be produced by the reaction ofbenzaldehyde and nitroethane in the presence of a basic catalyst. In this reaction, the base deprotonates nitroethane to form a resonance stabilized anion. This anion nucleophilically adds to the aldehyde forming a beta nitro alcohol, which is subsequently dehydrated to yield the nitroalkene. This reaction is known as a nitroaldol reaction.
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Phenyl-2-nitropropene (Methylamine Catalysis)
Phenyl-2-Nitropropene à la Barium: 1 mol benzaldehyde, 1.2 mol nitroethane and 15 mL diluted aqueous methylamine in 150 mL alcohol. Stirred and slightly heated for ca 4 hours. The reaction mixture is brought over into a beaker and cooled in the fridge (4). If precipitation doesn't commence at this point, water is poured in and the mixture put back in the fridge. The P2NP oil layer will slowly (or sometimes quickly) start forming a crystalline layer. If it doesn't, scratching the wall with e.g. a glass rod will help. If even this won't help, it means you probably fucked something up. The yields I have had using this "adaptation": 81% (i-PrOH), 79% (i-PrOH), 75% (EtOH) and 71% (EtOH) (yields calculated after crystallizing once; I store my crystals in the freezer and also recrystallize them prior to use).
Phenyl-2-nitropropene (Cyclohexylamine Catalysis)
To 55 g (0.5mol) Benzaldehyde in a 500mL Flask were added 40 g (0.5mol) Nitroethane and 10mL Cyclohexylamine. All was refluxed for 6h on a water bath. The result were 2 layers. One orange layer at the bottom with phenyl-2-nitropropene and a clear layer at the top with cyclohexylamine and maybe a little bit (~1mL) of H2O. 50mL of H2O were added and then sucked off with a pipette until the phenyl-2-nitropropene crystallized (it crystallized when it came in contact with air in presence of 15mL H2O). I added 200mL 95% denaturated ethanol to the orange crystals. The color of the now needle-like crystals changed from orange to white-yellow. The crystals were filtered. Yield 65 g, 78% of theory.
Phenyl-2-nitropropene (n-Butylamine Catalysis)
Chemicals
40 mL Benzaldehyde (~99%)
30 mL Nitroethane (>99%)
10 mL n-Butylamine (p.a.)
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