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Cyclopentanecarboxylic acid is an organic compound with the formula C 5 H 9 CO 2 H. It is a colorless nonvolatile oil. It is a colorless nonvolatile oil. It can be produced by the palladium -catalyzed hydrocarboxylation of cyclopentene : [ 2 ]
As an enone, 2-cyclopentenone undergoes the typical reactions of α-β unsaturated ketones, including nucleophilic conjugate addition, the Baylis–Hillman reaction, and the Michael reaction. Cyclopentenone also functions as an excellent dienophile in the Diels–Alder reaction , reacting with a wide variety of dienes .
Examples include 2-pentyl- and 2-heptylcyclopentanone. [4] It is a versatile synthetic intermediate, being a precursor to cyclopentobarbital. [5] Cyclopentobarbital, a drug made from cyclopentanone. Cyclopentanone is also used to make cyclopentamine, the pesticide pencycuron, and pentethylcyclanone. [5]
In 1895, Nikolai Kischner discovered that methylcyclopentane was the reaction product of hydrogenation of benzene using hydriodic acid. Prior to that, several chemists (such as Marcellin Berthelot in 1867, [ 9 ] [ 10 ] and Adolf von Baeyer in 1870 [ 11 ] ) had tried and failed to synthesize cyclohexane using this method.
Butyraldehyde, also known as butanal, is an organic compound with the formula CH 3 (CH 2) 2 CHO. This compound is the aldehyde derivative of butane. It is a colorless flammable liquid with an unpleasant smell. It is miscible with most organic solvents.
R)-2-Methylpent-4-enoic acid can be synthesized using a chiral auxiliary such an oxazolidinone derivative, popularized by David Evans. One route of synthesis consists of three steps: acylation of the oxazolidinone using triethylamine as a base, and DMAP as an acyl carrier catalyst
The Cram's rule of asymmetric induction named after Donald J. Cram states In certain non-catalytic reactions that diastereomer will predominate, which could be formed by the approach of the entering group from the least hindered side when the rotational conformation of the C-C bond is such that the double bond is flanked by the two least bulky groups attached to the adjacent asymmetric center. [3]
2-Pentanone or methyl propyl ketone (MPK) is a ketone and solvent of minor importance. It is comparable to methyl ethyl ketone , but has a lower solvency and is more expensive. [ 5 ] It occurs naturally in Nicotiana tabacum (Tobacco) [ 6 ] and blue cheese as a metabolic product of Penicillium mold growth.