Asymmetric Synthesis of ?-Amino Acids and ?-N-Hydroxyamino Acids fromN-Acylbornane-10,2-sultams: 1-chloro-1-nitrosocyclohexane as a practical [NH2+] equivalent
作者:Wolfgang Oppolzer、Osamu Tamura、J�Rg Deerberg
DOI:10.1002/hlca.19920750622
日期:1992.10.2
derivatives 5. These were converted into various amino acids 7, N-hydroxyamino acids 8, and an N-Boc-amino acid 9. (S, S)-Isoleucine (17) and (S, S)-2-acetamido-3-phenylbutyric acid (23) were obtained from N-crotonoylsultam 15via 1,4-addition of an organomagnesium or organocopper reagent followed by enolate ‘amination’ with 1.
Observations on the reaction of nitronate anions with oxalyl chloride: a new method for the preparation of geminal chloronitroso compounds
作者:Rafael Bou-Moreno、Sandra Luengo-Arratta、William B. Motherwell
DOI:10.1016/j.tetlet.2010.11.031
日期:2011.4
A simple method for the preparation of geminal chloronitroso compounds from secondary nitro compounds via their derived nitronate anions is presented.
提出了一种简单的方法,可通过仲硝基化合物通过其衍生的亚硝酸根阴离子制备双氯亚硝基化合物。
A modular, low footprint and scalable flow platform for the expedient α-aminohydroxylation of enolizable ketones
作者:Victor-Emmanuel H. Kassin、Romain Morodo、Thomas Toupy、Isaline Jacquemin、Kristof Van Hecke、Raphaël Robiette、Jean-Christophe M. Monbaliu
DOI:10.1039/d0gc04395h
日期:——
reactivity profile of α-chloronitroso derivatives is expressed to its fullest potential through the development of an integrated, modular and scalable continuous flow process for the electrophilic α-aminohydroxylation of various enolizable ketones. Flow conditions contribute to mitigating the high reactivity and toxicity of α-chloronitroso derivatives and provide an efficient, versatile and safe protocol for
Reactions of 1-Halo-1-nitroso- and 1-Halo-1-nitrocycloalkanes with Triphenylphosphine. A New Synthesis of Lactam
作者:Ikuo Sakai、Norio Kawabe、Masaji Ohno
DOI:10.1246/bcsj.52.3381
日期:1979.11
Reactions of 1-halo-1-nitroso- and 1-halo-1-nitrocycloalkanes with triphenylphosphine have been carried out. The Perkov reaction and Beckmann rearrangement occurred successively with the formation of lactams in high yields. The reaction of cycloalkanone oxime with halogen in the presence of triphenylphosphine also gave lactams in one step.
Chlorination of Oximes with Aqueous H<sub>2</sub>O<sub>2</sub>/HCl System: Facile Synthesis of <i>gem</i>-Chloronitroso- and <i>gem</i>-Chloronitroalkanes, <i>gem</i>-Chloronitroso- and <i>gem</i>-Chloronitrocycloalkanes
Chlorination of cyclic and linear ketone oximes with aqueous H2O2/HCl in a two-phase dichloromethane-water system selectively affords gem-chloronitroso compounds in yields of up to 94%. One-pot oxidation of the resulting gem-chloronitroso compounds with peracetic acid, prepared in situ, gives gem-chloronitroalkanes and cycloalkanes in yields of up to 82%. The advantages of the method are that it is facile and environmentally benign and does not require gaseous chlorine.