211449-24-0Relevant articles and documents
Corrigendum to “Copper ferrite superparamagnetic nanoparticles as a heterogeneous catalyst for directed phenol/formamide coupling” [Tetrahedron Lett. 58 (2017) 3370–3373] (Tetrahedron Letters (2017) 58(34) (3370–3373), (S0040403917309048), (10.1016/j.tetl
Le, Dung T.,Nguyen, Chung K.,Nguyen, Ngon N.,Nguyen, Tung T.,Nguyen, Viet D.,Phan, Nam T. S.,Tran, Kien N.
, (2021)
The authors regret that some characterization images of the catalyst and some NMR data of the compounds in Table 2 were shown incorrectly in the Supplementary Data. The coupling reactions were therefore re-run using the reported procedure and isolation of
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.
Nickel-catalyzed oxidative esterification of formamides with 1,3-dicarbonyl compounds under mild reaction conditions
Saberi, Dariush,Poorsadeghi, Samira
, (2017/09/30)
Synthesis of enol carbamates was achieved via nickel-catalyzed oxidative coupling of formamides with 1,3-dicarbonyl compounds in the presence of tert-butyl hydroperoxide at 40?°C. Various derivatives of enol carbamates were synthesized by this method in good to excellent yields.
