Synthesis of organophosphorus compounds via silyl esters of phosphorous acids
作者:Kamyar Afarinkia、Charles W. Rees、John I.G. Cadogan
DOI:10.1016/s0040-4020(01)87899-6
日期:1990.1
The addition of trimethylsilyloxy phosphorus (III)derivatives generated in situ to imines at room temperature provides a mild selective and high yielding route to α-aminoalkylphosphorate and α-aminoalkylphenylphosphinate esters. Isocyanates and carbodiimides react similarly to give phosphonoureas and phosphonoguarnidines respectively aldehydes and ketones are much less reactive and cyanides are inert
The reduction of imines to amines via transfer hydrogenation was achieved promoted by phosphine‐free manganese(I) catalyst. Using isopropanol as reductant, in the presence of tBuOK (4 mol %) and manganese complex [Mn(CO)3Br(κ2N,N‐PyCH2NH2)] (2 mol %), a large variety of aldimines (30 examples) were typically reduced in 3 hours at 80 °C with good to excellent yield.
Cyclopentadienyl N-heterocyclic carbene–nickel complexes as efficient pre-catalysts for the hydrosilylation of imines
作者:Linus P. Bheeter、Mickaël Henrion、Michael J. Chetcuti、Christophe Darcel、Vincent Ritleng、Jean-Baptiste Sortais
DOI:10.1039/c3cy00514c
日期:——
The in situ generated nickel hydride complex, [Ni(Mes2NHC)HCp], and its cationic analogue, [Ni(Mes2NHC)(NCMe)Cp](PF6), are efficient and chemoselective pre-catalysts for the hydrosilylation of both aldimines and ketimines under mild conditions.
Manganese catalyzed reductive amination of aldehydes using hydrogen as a reductant
作者:Duo Wei、Antoine Bruneau-Voisine、Dmitry A. Valyaev、Noël Lugan、Jean-Baptiste Sortais
DOI:10.1039/c8cc01787e
日期:——
A one-pot two-step procedure was developed for the alkylation of aminesvia reductive amination of aldehydes using molecular dihydrogen as a reductant in the presence of a manganese pyridinyl-phosphine complex as a pre-catalyst. After the initial condensation step, the reduction of imines formed in situ is performed under mild conditions (50–100 °C) with 2 mol% of catalyst and 5 mol% of tBuOK under
Visible-Light-Mediated, Chemo- and Stereoselective Radical Process for the Synthesis of <i>C</i>-Glycoamino Acids
作者:Peng Ji、Yueteng Zhang、Yongyi Wei、He Huang、Wenbo Hu、Patrick A. Mariano、Wei Wang
DOI:10.1021/acs.orglett.9b00724
日期:2019.5.3
for efficient synthesis of C-glycosyl amino acids is described. Different from typical photoredox-catalyzed reactions of imines, the new process follows a pathway in which α-imino esters serve as electrophiles in chemoselective addition reactions with nucleophilic glycosyl radicals. The process is highlighted by the mild nature of the reaction conditions, the highly stereoselectivity attending C–C