Cyclopentanone oxime

See Ethyl 2-formylpropionate oxime Hydrogen chloride Sulfuric acid Cyclopentanone oxime See other CATALYTIC IMPURITY INCIDENTS, OXIMES... 

Cyclopentanone oxime See Cyclopentanone oxime Sulfuric acid... 

Cyclohexanetrione trioxime, 2400 1,3,5-Cyclohexanetrione trioxime, 2401 Cyclohexanone oxime, 2452 Cyclopentanone oxime, 1932... 

This reaction was extended further to cyclopentenone and cyclopentanone oximes (Scheme 68). The greatest improvement in the syntheses was the use of M-ethyldizsopropylamine (Hiinig s base) that led to the highest yields of... 

Cyclopenta-l,2,3-dithiazole 140 was formed through a reaction of 2-substituted cyclopentanone oximes and S2CI2 (Scheme 71 2001CC403). Exhaustive chlorination accompanied this reaction as in the case of other cyclopentadithioles (see above). 

Derivatives of cyclopentanone oximes undergo Beckmann rearrangement to corresponding tetra- or hexahydropyridines or quinolines in the presence of Lewis acid (AICI3391.392 BF3.0Et2 or PPA ) or DIBAH (/-BujAlHl/CHiCb . ... 

A series of analogues of 2-iminopiperidine have been prepared and have been shown to be potent inhibitors of the human nitric oxide synthase isoforms °. The cyclopentanone oxime 346 was esterified with sodium hydroxide and benzenesulfonyl chloride and the subsequent Beckmann rearrangement afforded the 6-propylvalerolactam 348 as the major product and 3-propylvalerolactam 347 as a minor product (equation 133). The major product was converted into the intended 2-iminopiperidine 349. 

Numerous attempts to obtain pyrroles annelated with a cyclopentane ring, starting from cyclopentanone oxime, were unsuccessful. Despite widely varying conditions, it was possible to detect (by NMR or IR spectroscopy) only trace amounts of pyrroles in the products (84MI1). 

Cyclopentadienylsodium, 1849 p-Cyclopentadienyltrimethyltitanium, 3033 f Cyclopentane, 1933 Cyclopentanone, 1899 Cyclopentanone oxime, 1926 f Cyclopentene, 1885 f Cyclopentylamine, 1985... 

Cyclohexanetrione trioxime, 2395 Cyclohexanone oxime, 2446 Cyclopentanone oxime, 1926 2,3-Epoxypropionaldehyde oxime, 1178 Ethyl 2-formylpropionate oxime, 2448... 

Cyclopentanone Oxime. Violent reaction occurred on heating the oxime with 85% sulfuric acid to effect a Beckmann rearrangement.12... 

C5H7N302 1,2-dimethyl-4-nitro-1H-i midazole 13230-04-1 25.00 1.2956 2 5199 C5H9NO cyclopentanone oxime 1192-28-5 22.29 0.9570 2... 

By treating o-chloromethylaniline hydrochloride with cu-benzyloxy-butyro- and -valeronitriles in refluxing o-dichlorobenzene in the presence of stannic chloride, Mufloz and Madroilero obtained the tricyclic compounds 124 and 202, respectively. The pyrido[2,l- )]quinazolines 289 were prepared by refluxing o-chloromethylaniline hydrochloride in dichlorobenzene with 2-chloropyridine and its tetrahydro derivative. The latter was obtained in situhy Beckmann rearrangement of cyclopentanone oxime with phosphorus pentachloride. 

Grignard reagents have also been found to be effective for these types of transformations (equation 24), but not with cyclopentanone oxime sulfonate. ... 

In the laboratory of J.D. White, the asymmetric total synthesis of the non-natural (+)-codelne was accomplished via intramolecular carbenoid insertion In the late stages of the total synthesis It was necessary to Install a 6-membered piperidine moiety. This transformation was accomplished utilizing a Beckmann rearrangement of the cyclopentanone oxime portion of one of the intermediates. Later the 6-membered lactam was reduced to the corresponding amine with LAH. To this end, an oxime brosylate (Bs) was prepared, which underwent a smooth Beckmann rearrangement in acetic acid to provide a 69% yield of two isomeric lactams in an 11 1 ratio in favor of the desired isomer. 

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