Enantioselective synthesis of α-nitro-δ-ketosulfones via a quinine–squaramide catalyzed conjugate addition of α-nitrosulfones to enones
作者:Kalisankar Bera、Irishi N. N. Namboothiri
DOI:10.1039/c3cc45985c
日期:——
Conjugate addition of α-nitrosulfones to vinyl ketones in the presence of 0.2 mol% of a quinineâsquaramide organocatalyst afforded α-nitro-δ-ketosulfones possessing a tetrasubstituted chiral center in excellent yield and enantioselectivity in most cases. This strategy also offers a facile and convenient entry into γ-sulfonylhydroxamates that are one carbon homologs of potent enzyme inhibitors.
Substitution reactions which proceed via radical anion intermediates. 26. Oxidative substitution of nitroparaffin salts
作者:Nathan Kornblum、Haribansh K. Singh、William J. Kelly
DOI:10.1021/jo00151a011
日期:1983.2
El-Khawaga, Ahmed M.; Ismail, Mohamed T.; Abdel-Wahab, Aboel-Magd A., Gazzetta Chimica Italiana, 1982, vol. 112, # 5/6, p. 235 - 238
作者:El-Khawaga, Ahmed M.、Ismail, Mohamed T.、Abdel-Wahab, Aboel-Magd A.
DOI:——
日期:——
Electrooxidative coupling of salts of nitro compounds with halide, nitrite, cyanide, and phenylsulfinate anions
作者:A. I. Ilovaisky、V. M. Merkulova、Yu. N. Ogibin、G. I. Nikishin
DOI:10.1007/s11172-006-0007-7
日期:2005.7
salts of primary and secondary nitrocompounds (nitroethane, 1- and 2-nitropropanes, nitrocyclohexane, and nitrocycloheptane) in the presence of excess halide, nitrite, cyanide, and phenylsulfinate anions under undivided and divided amperostatic electrolysis conditions in a two-phase medium (CH2Cl2/H2O) produces geminal nitrohalides (35–85% yields), dinitro compounds (15–51%), nitronitriles (6–27%)
Enantioselective synthesis of γ-tetrasubstituted nitrosulfonyl carboxylates and amides via<scp>l</scp>-tert-leucine-derived-squaramide catalyzed conjugate addition of nitrosulfones to acrylates and acrylamides
作者:Kalisankar Bera、Irishi N. N. Namboothiri
DOI:10.1039/c4ob00344f
日期:——
Michael addition of α-nitrosulfones to aryl- and alkyl acrylates and acrylamides proceeds in the presence of 5–10 mol% of an amino acid derived new organocatalyst to provide γ-tetrasubstituted γ-nitro-γ-sulfonyl carboxylates and amides in excellent yields and enantioselectivities. Scale-up of the reaction to multi-grams, convenient recovery of the catalyst and its recyclability without any drop in