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4-Piperidone is an organic compound with the molecular formula OC(CH 2) 4 NH. It can be viewed as a derivative of piperidine. 4-Piperidone is used as an intermediate in the manufacture of chemicals and pharmaceutical drugs. Substituted and dehydro derivatives of 4-piperidinone are intermediates in alkaloid syntheses. [1]
In nonpolar solvents, a range between 0.2 and 0.6 kcal/mol has been estimated, but in polar solvents the axial conformer may be more stable. [21] The two conformers interconvert rapidly through nitrogen inversion ; the free energy activation barrier for this process, estimated at 6.1 kcal/mol, is substantially lower than the 10.4 kcal/mol for ...
Hydrazone formation of 1-methyl-4-piperidone (1) with benzohydrazide (2) gives (3). Catalytic hydrogenation using Adams' catalyst gives the substituted hydrazine (6) after acid-catalyzed hydrolysis to remove the benzoyl group and neutralization. The pyrazolone ring is formed in a condensation reaction with ethyl 2-benzoylbutanoate (7), yielding ...
N-Phenethyl-4-piperidinone (NPP) is a derivative of 4-piperidinone with the molecular formula C 13 H 17 NO. It is used as an intermediate in the manufacture of chemicals and pharmaceutical drugs such as fentanyl .
4-Pyridone exists a keto-enol tautomerism with its enol tautomer 4-hydroxypyridine. In solution , the keto tautomer is favoured, [ 4 ] and the enol tautomer only becomes important in very dilute solutions or solutions of non-polar solvents.
Piperidione (trade name Sedulon) is a sedative drug, structurally related to methyprylon and pyrithyldione.It used to be marketed by Roche as a cough medicine available in liquid form.
N 1-Methyl-4-pyridone-3-carboxamide, also abbreviated as 4PY, is a breakdown product of niacin and NAD, [1] that is associated with an increased risk of cardiovascular disease. [2] It has 2 carbonyl groups that are close to each other.
Piperidinones or piperidones are a class of chemical compounds sharing the piperidone skeleton. A classic named reaction for the synthesis of piperidones is the Petrenko-Kritschenko piperidone synthesis which involves combining an alkyl-1,3-acetonedicarboxylate with benzaldehyde and an amine. [1]