85630-23-5Relevant academic research and scientific papers
Directed ortho-Metalation of O-Aryl N,N-Dialkylcarbamates: Methodology, Anionic ortho-Fries Rearrangement, and Lateral Metalation
Miah, M. A. Jalil,Sibi, Mukund P.,Chattopadhyay,Familoni, Oluwole B.,Snieckus, Victor
, p. 440 - 446 (2017/12/15)
The directed ortho-lithiation reactions of O-aryl N,N-dialkylcarbamates as well as O-1-naphthyl and O-2-naphthyl N,N-dialkylcarbamates with sec-butyllithium/tetramethylethylenediamine (sBuLi/TMEDA) followed by quenching with various electrophiles afford a range of polysubstituted aromatic compounds. If the solutions of the ortho-lithiated carbamates are warmed to room temperature without the addition of external electrophiles, salicylamide and 1- and 2-hydroxynaphthamide derivatives are formed through anionic ortho-Fries rearrangements. The relative stabilities and reactivities of different O-aryl N,N-dialkylcarbamates were investigated. The lateral metalation of 2-tolyl carbamates with lithium diisopropylamide (LDA) provides a route to benzo[b]furan-2(3H)-ones. Previously reported results are used in a comparison of seven O-based directed metalation groups in reactions with several electrophiles. The described methodology is useful for the preparation of 1,2,3-substituted aromatic compounds.
Directed ortho-Metalation of Aryl Amides, O-Carbamates, and Methoxymethoxy Systems: Directed Metalation Group Competition and Cooperation
Miah, M. A. Jalil,Sibi, Mukund P.,Chattopadhyay,Familoni, Oluwole B.,Snieckus, Victor
, p. 447 - 454 (2017/12/15)
A systematic study on the competitive metalation of derivatives containing four directed metalation groups (DMGs), namely, Cl, OMe, methoxymethoxy (OMOM), and CONEt2, in comparison with the OCONEt2 DMG is described. In addition, the
AMINATION OF ARYL ALCOHOL DERIVATIVES
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Page/Page column 44-45, (2012/07/27)
Embodiments of the invention provide methods and materials for chemical cross-coupling reactions that utilize aryl alcohol derivatives as cross-coupling partners. Embodiments of the invention include methods for the amination of aryl sulfamates and carbamates, which are attractive cross-coupling partners, particularly for use in multistep synthesis. Illustrative embodiments include versatile means to use simple derivatives of phenol as precursors to polysubstituted aryl amines, as exemplified by a concise synthesis of the antibacterial drug linezolid.
Iridium-catalyzed C-H activation versus directed ortho metalation: Complementary borylation of aromatics and heteroaromatics
Hurst, Timothy E.,Macklin, Todd K.,Becker, Maike,Hartmann, Eduard,Kuegel, Wolfgang,Parisienne-LaSalle, Jean-Christophe,Batsanov, Andrei S.,Marder, Todd B.,Snieckus, Victor
supporting information; experimental part, p. 8155 - 8161 (2010/09/18)
Systematic studies are presented demonstrating the complementarity of directed ortho metalation (DoM) and Ir-catalyzed strategies for the provision of borylated aromatics and their subsequent Suzuki-Miyaura coupling reactions. A new concept, the use of the TMS group, readily introduced by DoM, as a latent regiodirective moiety to overcome the otherwise problematic production of isomeric borylated product mixtures is presented. Additional electrophile-induced ipso-deborylation and DoM reactions of the Bpin products are described.
The Directed Ortho Lithiation of O-Aryl Carbamates. An Anionic Equivalent of the Fries Rearrangement
Sibi, Mukund P.,Snieckus, Victor
, p. 1935 - 1937 (2007/10/02)
Ortho-Lithiated O-aryl carbamates 3 constitute new synthetic intermediates which by treatment with a variety of electrophiles lead to ortho-substituted carbamates 4 and by rearrangement provide salicylamides 6.
