排序方式: 共有7条查询结果,搜索用时 15 毫秒
1
1.
A. I. Vas’kevich N. M. Tsizorik E. B. Rusanov V. I. Stanitets M. V. Vovk 《Russian Journal of Organic Chemistry》2011,47(8):1146-1152
Sterically nonhindered N-alkyl(aryl)amides of cinnamylacetic acid in the reaction with phenyl(4-tolyl)sulfenyl chlorides in
acetic acid in the presence of lithium perchlorate undergo a selective cyclization into 5-arylsulfanyl-6-phenylpiperidin-2-ones.
Under similar conditions the reaction with arylsulfenyl chlorides of amides containing bulky substituents at the nitrogen
atom resulted in 5-arylsulfanyl-6-phenyltetrahydropyran-2-iminium perchlorates, which by treatment with aqueous ethanol were
converted into the corresponding derivatives of pyran-2-ones. 相似文献
2.
N. M. Tsizorik A. I. Vas’kevich E. B. Rusanov A. B. Rozhenko M. V. Vovk 《Russian Journal of Organic Chemistry》2014,50(10):1397-1408
2-(Cyclohex-2-en-1-yl)acetanilides react with arylsulfanyl chlorides in chloroform to give 2-(2-arylsulfanyl-3-chlorocyclohexyl)acetanilides which undergo isomerization into 2-chloro-3-arylsulfanylsubstituted derivatives in polar solvents. According to the results of quantum chemical calculations, the addition of arylsulfanyl chlorides to 2-(cyclohex-2-en-1-yl)acetanilides is characterized by negative Gibbs energy. Specific conformation of the isomerization products is stabilized by weak (non-covalent) interactions which make them more energetically favorable than the initial compounds. The reactions of 2-(cyclohex-2-en-1-yl)acetanilides with arylsulfanyl chlorides in nitromethane in the presence of lithium perchlorate lead to the formation of mixtures of the corresponding addition products and electrophilic intramolecular cyclization products, N-[7-(arylsulfanyl)octahydro-1-benzofuran-2-ylidene]anilinium perchlorates, which are converted into free bases by treatment with sodium ethoxide. 相似文献
3.
A. I. Vas’kevich N. M. Tsizorik E. B. Rusanov V. I. Staninets M. V. Vovk 《Russian Journal of Organic Chemistry》2012,48(2):193-201
N-Alkyl(aryl)amides of allylacetic acid when reacting with arylsulfenyl chlorides in acetic acid in the presence of lithium
perchlorate undergo a selective cyclization to form N-{(2Z)-5-[(arylsulfanyl)methyl] dihydrofuran-2(3H)-ylidene}-N-alkyl-(aryl)aminium perchlorates. Treating of the latter with sodium acetate leads to the formation of the corresponding
5-[(arylsulfanyl)methyl]lactones, and with sodium ethylate, to 5-[(arylsulfanyl) methyl]-2-iminolactones. In reaction with
secondary cycloalkylamines in the presence of water a transamidation and tetrahydrofuran ring opening occurs to afford 5-arylsulfanyl-4-hydroxypentanoic
acid amides. 相似文献
4.
A. I. Vas’kevich N. M. Tsizorik V. I. Staninets M. V. Vovk 《Russian Journal of Organic Chemistry》2013,49(8):1168-1174
Anilides of 5-hexenoic acid react with arylsulfenyl chlorides in nitromethane in the presence of lithium perchlorate affording products of electrophilic cyclization, N-{6-[(arylsulfanyl)methyl]tetrahydro-2H-pyran-2-ylidene}anilinium perchlorates. The treatment of the latter with sodium acetate or secondary cycloalkylamines in the presence of water results in the opening of the tetrahydropyran ring and provides anilides or cycloalkylamides of 6-arylsulfanyl-5-hydroxyhexanoic acid. 相似文献
5.
6.
Hrynyshyn Yevhenii V. Musiychuk Anna R. Tsizorik Nazar M. Bol’but Andriy V. Vovk Mikhailo V. 《Chemistry of Heterocyclic Compounds》2019,55(11):1070-1074
Chemistry of Heterocyclic Compounds - 4-Bromopyrazolo[1,5-a]pyrazines react with aryl(hetaryl)boronic acids in the presence of catalytic amounts of Pd(dppf)Cl2·CH2Cl2 and an excess of Cs2CO3... 相似文献
7.
Tsizorik Nazar M. Hrynyshyn Yevhenii V. Bol’but Andriy V. Vovk Mykhailo V. 《Chemistry of Heterocyclic Compounds》2018,54(11):1075-1078
Chemistry of Heterocyclic Compounds - 4-Chloropyrazolo[1,5-a]pyrazines react with ethyl isocyanoacetate to form ethyl imidazo[1,5-a]pyrazolo[5,1-c]pyrazine-1-carboxylates, hydrolysis of which... 相似文献
1