N-Bromosuccinimide promoted and base switchable one pot synthesis of α-imido and α-amino ketones from styrenes
作者:Mahesh H. Shinde、Umesh A. Kshirsagar
DOI:10.1039/c5ob02034d
日期:——
N-Bromosuccinimide (NBS) promoted one pot strategy for the synthesis of α-amino functionalized aryl ketones starting from commercially available styrenes has been developed. NBS participates in multiple tasks, such as bromonium ion formation, oxidation of bromohydrin and providing a nucleophilic nitrogen source. The reaction can easily be switched between α-imido and α-amino ketones by the choice of base
The development of a fast and oxidative coupling cum difunctionalisation reaction enables the benign synthesis of valuable α-substituted ketones from alkynes, as well as the direct synthesis of the psychoactive drug cathinone.
One-Pot Cascade Leading to Direct α-Imidation of Ketones by a Combination of <i>N</i>-Bromosuccinimide and 1,8-Diazabicyclo[5.4.1]undec-7-ene
作者:Ying Wei、Shaoxia Lin、Fushun Liang
DOI:10.1021/ol301871s
日期:2012.8.17
A one-pot cascade transformation of ketones into alpha-imidoketones has been developed, in which N-bromosuccinimide (NBS) provides both electrophilic bromine and nucleophilic nitrogen sources, and diazabicyclo[5.4.1]undec-7-ene (DBU) functions as a base and a nucleophilic promoter for the activation of NBS. alpha-Bromination is supposed as the key step in the process, which takes place between more electrophilic bromide active species and enolates.
ZAVYALOV, S. I.;EZHOVA, G. I.;SITKAREVA, I. V.;ZAVOZIN, A. G., IZV. AN CCCP. CEP. XIM.,(1988) N 8, 1940
作者:ZAVYALOV, S. I.、EZHOVA, G. I.、SITKAREVA, I. V.、ZAVOZIN, A. G.
DOI:——
日期:——
NaBO2�4H2O-KBr-Bu4 $$\mathop N\limits^ + \mathop I\limits^ -$$ -DMF system for the N-alkylation of imides by ?-bromoketones
作者:S. I. Zav'yalov、G. I. Ezhova、I. V. Sitkareva、A. G. Zavozin