Catalytic Intermolecular Linear Allylic C−H Amination via Heterobimetallic Catalysis
作者:Sean A. Reed、M. Christina White
DOI:10.1021/ja710206u
日期:2008.3.1
Streamlined routes to (E)-allylic carbamates that can be further elaborated to medicinally and biologically relevant allylic amines are also demonstrated. Valuable 15N-labeled allylic amines may be generated directly from allyl moieties at late stages of synthetic routes by using the readily available 15N-(methoxycarbonyl)-p-toluenesulfonamide nucleophile. Evidence is provided that this reaction proceeds
A Bulky Disulfoxide Ligand for Pd-Catalyzed Oxidative Allylic C–H Amination with 2,2,2-Trichloroethyl Tosyl Carbamate
作者:You-Gui Li、Li Li、Ming-Yue Yang、Gang He、Eric Assen B. Kantchev
DOI:10.1021/acs.joc.6b03089
日期:2017.5.5
Challenging substrates and conditions in homogeneous catalysis pose stringent demands on the ligands used. A novel, bulky, 1-adamantyl-substituted disulfoxide ligand designed after a systematic evaluation of the electronic and steric properties of disulfoxide substituents permits the allylic oxidative C–N coupling reaction to proceed at lower catalyst loading while requiring a smaller excess of reagents
Aerobic Linear Allylic C–H Amination: Overcoming Benzoquinone Inhibition
作者:Christopher C. Pattillo、Iulia I. Strambeanu、Pilar Calleja、Nicolaas A. Vermeulen、Tomokazu Mizuno、M. Christina White
DOI:10.1021/jacs.5b11294
日期:2016.2.3
linear allylic C-H amination reaction is reported under palladium(II)/bis-sulfoxide/Brønsted base catalysis. The reaction operates under preparative, operationally simple conditions (1 equiv of olefin, 1 atm O2 or air) with reduced Pd(II)/bis-sulfoxide catalyst loadings while providing higher turnovers and product yields than systems employing stoichiometric benzoquinone (BQ) as the terminal oxidant
A Catalytic, Brønsted Base Strategy for Intermolecular Allylic C−H Amination
作者:Sean A. Reed、Anthony R. Mazzotti、M. Christina White
DOI:10.1021/ja903939k
日期:2009.8.26
A Bronsted base activation mode for oxidative, Pd(II)/sulfoxide-catalyzed, intermolecular C-H allylic amination is reported. N,N-diisopropylethylamine was found to promote amination of unactivated terminal olefins, forming the corresponding linear allylic amine products with high levels of stereo-, regio-, and chemoselectivity. The predictable and high selectivity of this C-H oxidation method enables late-stage incorporation of nitrogen into advanced synthetic intermediates and natural products.
C–H to C–N Cross-Coupling of Sulfonamides with Olefins
作者:Rulin Ma、M. Christina White
DOI:10.1021/jacs.7b13492
日期:2018.3.7
coupling conditions stands to significantly impact chemical synthesis. Herein, we disclose a C(sp3)-N fragment coupling reaction between terminalolefins and N-triflyl protected aliphatic and aromatic amines via Pd(II)/SOX (sulfoxide-oxazoline) catalyzed intermolecular allylic C-H amination. A range of (56) allylic amines are furnished in good yields (avg. 75%) and excellent regio- and stereoselectivity