A Versatile Tripodal Cu(I) Reagent for C–N Bond Construction via Nitrene-Transfer Chemistry: Catalytic Perspectives and Mechanistic Insights on C–H Aminations/Amidinations and Olefin Aziridinations
作者:Vivek Bagchi、Patrina Paraskevopoulou、Purak Das、Lingyu Chi、Qiuwen Wang、Amitava Choudhury、Jennifer S. Mathieson、Leroy Cronin、Daniel B. Pardue、Thomas R. Cundari、George Mitrikas、Yiannis Sanakis、Pericles Stavropoulos
DOI:10.1021/ja503869j
日期:2014.8.13
intermediates play a major role and are generated by hydrogen-atom abstraction from substrate C-H bonds or initial nitrene-addition to one of the olefinic carbons. Subsequent processes include solvent-caged radical recombination to afford the major amination and aziridination products but also one-electron oxidation of diffusively free carboradicals to generate amidination products due to carbocation
Asymmetric Synthesis of β
<sup>2</sup>
‐Aryl Amino Acids through Pd‐Catalyzed Enantiospecific and Regioselective Ring‐Opening Suzuki–Miyaura Arylation of Aziridine‐2‐carboxylates
作者:Youhei Takeda、Tetsuya Matsuno、Akhilesh K. Sharma、W. M. C. Sameera、Satoshi Minakata
DOI:10.1002/chem.201902009
日期:2019.8
A Pd‐catalyzed enantiospecific and regioselective ring‐opening Suzuki–Miyaura arylation of aziridine‐2‐carboxylates was developed. The cross‐coupling allows for the asymmetric preparation of enantioenriched β2‐aryl amino acids, starting from commercially available enantiopure d‐ and l‐serine esters. The mechanism and selectivity of the reaction was rationalized based on computational models.
Iron(III) Porphyrin Catalyzed Aziridination of Alkenes with Bromamine-T as Nitrene Source
作者:Renu Vyas、Guang-Yao Gao、Jeremiah D. Harden、X. Peter Zhang
DOI:10.1021/ol049691k
日期:2004.6.1
[reaction: see text] Iron(III) porphyrin complexes Fe(Por)Cl are effective catalysts for aziridination of alkenes using bromamine-T as the nitrene source. The catalytic system can operate under mild conditions with alkenes as limiting reagents. The aziridination reaction is general and suitable for a wide variety of alkenes, including aromatic, aliphatic, cyclic, and acyclic olefins, as well as alpha,beta-unsaturated
(NHC)M Cores as Catalysts for the Olefin Aziridination Reaction (M = Cu, Ag, Au): Evidencing a Concerted Mechanism for the Nitrene Transfer Process
作者:Jorge Pérez-Ruíz、Pedro J. Pérez、M. Mar Díaz-Requejo
DOI:10.1021/acs.organomet.2c00310
日期:2022.11.28
Complexes of the form [(NHC)MCl] (M = coinage metal) have been evaluated as catalysts for the olefin aziridination reaction using PhI═NTs as the nitrene source, with moderate to high activity being found depending on the metal and the olefin. At variance with frequently employed copper catalysts with bi-, tri-, or tetradentate N-donor ligands, these monodentante C-donor ligands induce a remarkable
[(NHC)MCl](M = 铸币金属)形式的配合物已被评估为使用 PhI = NT 作为氮烯源的烯烃氮丙啶化反应的催化剂,根据金属和烯烃发现具有中等至高活性。与经常使用的具有双、三或四齿 N-供体配体的铜催化剂不同,这些单齿 C-供体配体在反应机制中产生显着影响。实验证据支持协同机制和不存在自由基中间体的提议,自由基中间体是参与这些氮烯转移反应的常见物种。
Regiospecific Reductive Cleavage of the C(2)−N Bond of Aziridines Substituted with an Electron Acceptor Mediated by Mg/MeOH