Electrophilic intramolecular cyclization of functional dervatives of unsaturated compounds: VII. Synthesis of 5-arylsulfanyl-6-phenylpiperidin-2-ones in the absence of salt additives and their selective reduction and oxidation
摘要:
Cinnamylacetamides reacted with arylsulfenyl chlorides in chloroform in the absence of LiClO4 affording 5-(arylsulfanyl)-6-phenylpiperidin-2-ones. Their reduction with a system LiAlH4-AlCl3 resulted in 3-(tolylsulfanyl)-1,2-diphenylpiperidine, and with Raney nickel, in 1-aryl-6-phenylpiperidin-2-ones. The latter treated with LiAlH4-AlCl3 were converted into 1-aryl-2-phenyl-piperidines. The oxidation of 5-(arylsulfanyl)-6-phenylpiperidin-2-ones with hydrogen peroxide in acetone led to the formation of 5-sulfinyl-, and with oxone, to 5-sulfonyl derivatives.
Intramolecular electrophilic cyclization of functional derivatives of unsaturated Compounds: I. Synthesis of 5-arylsulfanyl-6-phenylpiperidin-2-ones from cinnamylacetamides and arylsulfenyl chlorides
作者:A. I. Vas’kevich、N. M. Tsizorik、E. B. Rusanov、V. I. Stanitets、M. V. Vovk
DOI:10.1134/s1070428011080057
日期:2011.8
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 arylsulfenylchlorides of amides containing bulky substituents at the nitrogen atom resulted in 5-arylsulfanyl-6-phenyl
Electrophilic intramolecular cyclization of functional dervatives of unsaturated compounds: VII. Synthesis of 5-arylsulfanyl-6-phenylpiperidin-2-ones in the absence of salt additives and their selective reduction and oxidation
作者:N. M. Tsizorik、A. I. Vas’kevich、R. I. Vas’kevich、M. V. Vovk
DOI:10.1134/s1070428015020165
日期:2015.2
Cinnamylacetamides reacted with arylsulfenyl chlorides in chloroform in the absence of LiClO4 affording 5-(arylsulfanyl)-6-phenylpiperidin-2-ones. Their reduction with a system LiAlH4-AlCl3 resulted in 3-(tolylsulfanyl)-1,2-diphenylpiperidine, and with Raney nickel, in 1-aryl-6-phenylpiperidin-2-ones. The latter treated with LiAlH4-AlCl3 were converted into 1-aryl-2-phenyl-piperidines. The oxidation of 5-(arylsulfanyl)-6-phenylpiperidin-2-ones with hydrogen peroxide in acetone led to the formation of 5-sulfinyl-, and with oxone, to 5-sulfonyl derivatives.