Controllable Intramolecular Unactivated C(sp3)-H Amination and Oxygenation of Carbamates
Dual catalyst-controlled intramolecular unactivated C(sp3)-H amination and oxygenation of carbamates merging visible-light photocatalysis and earth-abundant transition metal catalysis have been reported. Useful amino alcohol and diol derivatives could be selectively obtained from readily available tertiary alcohol derivatives. The possible mechanisms have been proposed via a 1,5-HAT process followed by Lewis acid-controlled cyclization. The nickel and zinc catalysts inhibit the formation of oxygenation and amination products, respectively. An interesting phenomenon of chirality transfer is also observed.
Guo, Qihang,Ren, Xiang,Lu, Zhan
p. 880 - 884
(2019/05/16)
Stabilization and activation of dienolates with germanium and tin. Stero- and regioselective aldol reactions, regioselective coupling reactions, and regioselective synthesis of amino acid derivatives
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Yamamoto,Hatsuya,Yamada
p. 3118 - 3128
(2007/10/02)
2-Methyl-1-phenyl-1-propenyllithium. A Vinyllithium Derivative Showing Catalyzed Transmetalation
Full preparative and kinetic details are given for the apparent vinyl-to-allyl anion rearrangement of the title compound 1.The rapid and quantitative formation of the allyllithium derivative 7 is shown to be catalyzed by 2-methyl-1-phenyl-1-propene (2).An intermolecular transmetalation mechanism with de-aggregation and ionization steps is suggested to explain the orders of reaction, parameters of activation, and solvent dependency.
Knorr, Rudolf,Lattke, Ernst
p. 2116 - 2131
(2007/10/02)
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