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Synthesis of allylamines

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Exposure of various N-arylsulfonyl aldimines to 2-butyne and hydrogen at ambient pressure in the presence of a cationic iridium(I) catalyst modified by BIPHEP provides reductive coupling products, allylic amines, in good yields as single geometrical isomers. Nonsymmetric alkynes couple under standard conditions with high levels of regioselection.
A. Barchuk, M.-Y. Ngai, M. J. Krische, J. Am. Chem. Soc., 2007, 129, 8432-8433.


Using an iridium catalyst modified by (R)-Cl,MeO-BIPHEP, the hydrogenating of alkynes in the presence of N-arylsulfonyl imines delivers the corresponding allylic amines in highly optically enriched form. This protocol circumvents the use of preformed vinyl metal reagents and is applicable to aromatic, heteroaromatic, and aliphatic N-arylsulfonyl aldimines.
M.-Y. Ngai, A. Barchuk, M. J. Krische, J. Am. Chem. Soc., 2007, 129, 12644-12645.


A highly efficient three-component coupling reaction between thioformamides and organolithium and Grignard reagents was developed. The generality of the process has been demonstrated by using various combinations of reactants and reagents.
T. Murai, F. Asai, J. Am. Chem. Soc., 2007, 129, 780-781.


A hydrovinylation of N-acetylenamines with ethylene is catalyzed by a ruthenium hydride complex, RuHCl(CO)(PCy3)2, providing a series of N-acetylamines with a quaternary carbon center with up to 99% yield.
Q.-S. Wang, J.-H. Xie, W. Lei, S.-F. Zhu, L.-X. Wang, Q.-L. Zhou, Org. Lett., 2011, 13, 3388-3391.


Exposure of aromatic and aliphatic N-arylsulfonyl aldimines to equal volumes of acetylene and hydrogen gas at 45°C and ambient pressure in the presence of chirally modified cationic rhodium catalysts provides (Z)-dienyl allylic amines in highly optically enriched form and as single geometrical isomers.
E. Skucas, J. R. Kong, M. J. Krische, J. Am. Chem. Soc., 2007, 129, 7242-7243.


An efficient method for the preparation of various 2-aminomethyl-1,3-dienes was developed through the reaction of imines with an organoindium reagent generated in situ from indium and 1,3-dibromo-2-butyne. Three-component reactions of aldehydes, amines, and organoindium reagents gave successful results in a one-pot process.
D. Seomoon, J. A, P. H. Lee, Org. Lett., 2009, 11, 2401-2404.


Catalytic Asymmetric Aza-Morita-Baylis-Hillman Reaction of Methyl Acrylate: Role of a Bifunctional La(O-iPr)3/Linked-BINOL Complex
T. Yukawa, B. Seelig, Y. Xu, H. Morimoto, Y. Xu, H. Morimoto, S. Matsunaga, A. Berkessel, M. Shibasaki, J. Am. Chem. Soc., 2010, 132, 11988-11992.


(S)-3-[2-(Diphenylphosphino)phenyl]BINOL is an efficient asymmetric bifunctional organocatalyst for the aza-Morita-Baylis-Hillman reaction. The Brønsted acid and Lewis base functionalities cooperate in substrate activation to promote the reaction with high enantiocontrol.
K. Matsui, S. Takizawa, H. Sasai, Synlett, 2006, 761-765.


(S)-3-(N-Isopropyl-N-3-pyridinylaminomethyl)BINOL is an efficient, bifunctional organocatalyst for the enantioselective aza-Morita-Baylis-Hillman (aza-MBH) reaction. The acid-base-mediated functionalities for the activation of the substrate and the fixing of conformation of the organocatalyst are harmoniously performed to promote the reaction with high enantiocontrol.
K. Matsui, S. Takizawa, H. Sasai, J. Am. Chem. Soc., 2005, 127, 3680-3681.


Chiral Bifunctional Organocatalysts in Asymmetric Aza-Morita-Baylis-Hillman Reactions of Ethyl (Arylimino)acetates with Methyl Vinyl Ketone and Ethyl Vinyl Ketone
M. Shi, G.-N. Ma, J. Gao, J. Org. Chem., 2007, 72, 9779-9781.


Allylic N-sulfonylamines are synthesized in high yields and with high regioselectivities by reaction of N-sulfonylaziridines with excess dimethylsulfonium methylide.
D. M. Hodgson, M. J. Fleming, S. J. Stanway, Org. Lett., 2005, 7, 3295-3298.


Opening of the epoxide ring of enantiopure (2R,1'S)-2-(1-aminoalkyl)epoxides with different organolithium compounds gave allylamines with total selectivity and in high yields.
J. M. Concellon, J. R. Suarez, V. del Solar, Org. Lett., 2006, 8, 349-351.


The reaction of various aromatic nitriles and conjugated alkenenitriles with 1.1 equiv of Ti(OiPr)4 and 2.2 equiv of EtMgBr followed by addition of a Lewis acid gave 1-arylcyclopropylamines and 1-alkenylcyclopropylamines in good yields.
P. Bertus, J. Szymoniak, J. Org. Chem., 2003, 68, 7133-7136.