122394-38-1Relevant articles and documents
An efficient synthesis of aryl α-keto esters
Ma, Ming,Li, Changkun,Peng, Lingling,Xie, Fang,Zhang, Xiu,Wang, Jianbo
, p. 3927 - 3929 (2005)
A new one-pot approach for the synthesis of aryl α-keto ester based on the diazo transfer and oxidation of diazo group is developed.
Photoinduced Diverse Reactivity of Diazo Compounds with Nitrosoarenes
Roy, Sourav,Kumar, Gourav,Chatterjee, Indranil
supporting information, p. 6709 - 6713 (2021/09/08)
A diverse reactivity of diazo compounds with nitrosoarene in an oxygen-transfer process and a formal [2 + 2] cycloaddition is reported. Nitosoarene has been exploited as a mild oxygen source to oxidize an in situ generated carbene intermediate under visible-light irradiation. UV-light-mediated in situ generated ketenes react with nitosoarenes to deliver oxazetidine derivatives. These operationally simple processes exemplify a transition-metal-free and catalyst-free protocol to give structurally diverse α-ketoesters or oxazetidines.
Carbene-Catalyzed Enantioselective Aromatic N-Nucleophilic Addition of Heteroarenes to Ketones
Liu, Yonggui,Luo, Guoyong,Yang, Xing,Jiang, Shichun,Xue, Wei,Chi, Yonggui Robin,Jin, Zhichao
supporting information, p. 442 - 448 (2019/11/25)
The aromatic nitrogen atoms of heteroarylaldehydes are activated by carbene catalysts to react with ketone electrophiles. Multi-functionalized cyclic N,O-acetal products are afforded in good to excellent yields and optical purities. Our reaction involves the formation of an unprecedented aza-fulvene-type acylazolium intermediate. A broad range of N-heteroaromatic aldehydes and electron-deficient ketone substrates works effectively in this transformation. Several of the chiral N,O-acetal products afforded through this protocol exhibit excellent antibacterial activities against Ralstonia solanacearum (Rs) and are valuable in the development of novel agrichemicals for plant protection.
Displacement of Dinitrogen by Oxygen: A Methodology for the Catalytic Conversion of Diazocarbonyl Compounds to Ketocarbonyl Compounds by 2,6-Dichloropyridine-N-oxide
Yu, Yang,Sha, Qiang,Cui, Hui,Chandler, Kory S.,Doyle, Michael P.
supporting information, p. 776 - 779 (2018/02/09)
Dirhodium(II) catalyzed dinitrogen extrusion from diazocarbonyl compounds by 2,6-dichloropyridine-N-oxide forms ketocarbonyl compounds in near-quantitative yields. Reactions occur at room temperature, and the pyridine product does not coordinate with dirhodium(II) to inhibit catalysis. Anhydrous tricarbonyl compounds, as well as dicarbonyl compounds, are conveniently prepared by this methodology, and they have been used in situ for catalytic ene and aldol transformations.
Enantioselective Iridium-Catalyzed Hydrogenation of α-Keto Amides to α-Hydroxy Amides
Gu, Guoxian,Yang, Tilong,Yu, Ouran,Qian, Hua,Wang, Jiang,Wen, Jialin,Dang, Li,Zhang, Xumu
supporting information, p. 5920 - 5923 (2017/11/10)
A highly enantioselective iridium-catalyzed hydrogenation of α-keto amides to form α-hydroxy amides has been achieved with excellent results (up to >99% conversion and up to >99% ee, TON up to 100?000). As an example, this protocol was applied to the synthesis of (S)-4-(2-amino-1-hydroxyethyl)benzene-1,2-diol, the enantiomer of norepinephrine, which is widely used as an injectable drug for the treatment of critically low blood pressure. Density functional theory (DFT) calculations were also carried out to reveal the reaction mechanism.
Regioselective synthesis of 1-substituted indazole-3-carboxylic acids
Veerareddy, Arava,Gogireddy, Surendrareddy,Dubey
, p. 1311 - 1321 (2015/04/27)
In this article, we study the synthesis of 1-substituted indazole-3-carboxylic acids from 2-halobenzoic acids.
P(NMe2)3-Mediated Umpolung Alkylation and Nonylidic Olefination of α-Keto Esters
Wang, Sunewang Rixin,Radosevich, Alexander T.
, p. 3810 - 3813 (2015/08/18)
A commercial phosphorus-based reagent (P(NMe2)3) mediates umpolung alkylation of methyl aroylformates with benzylic and allylic bromides, leading to either Barbier-type addition or ylide-free olefination products upon workup. The reaction sequence is initiated by a two-electron redox addition of the tricoordinate phosphorus reagent with an α-keto ester compound (Kukhtin-Ramirez addition). A mechanistic rationale is offered for the chemoselectivity upon which the success of this nonmetal mediated C-C bond forming strategy is based.
Electrochemical synthesis of the aryl α-ketoesters from acetophenones mediated by Ki
Zhang, Zhenlei,Su, Jihu,Zha, Zhenggen,Wang, Zhiyong
supporting information, p. 17711 - 17714 (2014/01/17)
Two C-O bonds formed in one step: The oxidative coupling reaction of acetophenones with alcohol was developed by a dioxygen activation to afford α-ketoesters under electrochemical conditions. This novel transformation not only provides a simple and efficient approach to synthetize α-ketoester derivatives, but also invents a new strategy to construct a C-O bond by virtue of an anode oxidation (see scheme). Copyright
Construction of 1,2,5-tricarbonyl compounds using methyl cyanoacetate as a glyoxylate anion synthon combined with copper(I) iodide-catalyzed aerobic oxidation
Kim, Se Hee,Kim, Ko Hoon,Kim, Jae Nyoung
, p. 3335 - 3339 (2012/01/19)
A practical and efficient synthesis of various 1,2,5-tricarbonyl compounds is described. The synthesis has been carried out by a conjugate addition of methyl cyanoacetate to the β-position of α,β-unsaturated carbonyl compounds and a subsequent copper(I) iodide-catalyzed aerobic oxidation. In addition, various α-aryl- and α-alkyl-α-keto esters have been synthesized using a similar approach. Copyright
Facile synthesis of aryl α-keto esters via the reaction of aryl diazoacetate with H2O and DEAD
Guo, Zhenqiu,Huang, Haoxi,Fu, Qingquan,Hu, Wenhao
, p. 2486 - 2488 (2008/02/11)
A facile synthesis of aryl aα-keto esters in high yields is reported involving the reaction of aryl diazoacetate with H2O and diethyl azodicarboxylate (DEAD) catalyzed by dirhodium acetate. Georg Thieme Verlag Stuttgart.