Unprotected Amino Acids as Stable Radical Precursors for Heterocycle C–H Functionalization
作者:Duy N. Mai、Ryan D. Baxter
DOI:10.1021/acs.orglett.6b01754
日期:2016.8.5
of heteroarenes using unprotected amino acids as stable alkyl radical precursors is reported. This one-pot procedure is performed open to air under aqueous conditions and is effective for several natural and unnatural amino acids. Heterocycles of varying structure are suitably functionalized, and reactivity trends reflect the nucleophiliccharacter of the radical species generated.
The present invention generally relates to quinoxaline compounds having Formula 1 or Formula 2 wherein the variables are as defined herein, and methods of using them.
Mild Condition for the Deoxygenation of α-Heteroaryl-Substituted Methanol Derivatives
作者:Na Meng、Wensheng Yu、Takao Suzuki、Maofen Chen、Zhiqi Qi、Bin Hu、Jianming Bao、John S. Debenham、Robert Mazzola、Joseph L. Duffy
DOI:10.1021/acs.joc.1c00067
日期:2021.4.16
deoxygenation of substituted methanol derivatives has been identified. This metal-free process was found to proceed well on secondary or tertiary alcohols substituted with one or two heteroaryl groups, and it tolerates acid-sensitive heterocycles. This condition works for methanol derivativessubstituted with 2-pyridyl, 4-pyridyl, or other heterocyclic groups, allowing the negative charge formed during
已经确定了通过PPh 3 / I 2 /咪唑使取代的甲醇衍生物脱氧的温和条件。发现这种无金属的方法在被一个或两个杂芳基取代的仲或叔醇上可以很好地进行,并且可以耐受酸敏感的杂环。此条件适用于被2-吡啶基,4-吡啶基或其他杂环基取代的甲醇衍生物,从而使反应过程中形成的负电荷共振成氮原子。在该条件下,被3-吡啶基或杂环基取代的甲醇衍生物不允许在反应过程中形成的负电荷共振到氮原子上。
Design and Implementation of a Catalytic Electron Donor–Acceptor Complex Platform for Radical Trifluoromethylation and Alkylation
作者:Edward J. McClain、Timothy M. Monos、Mayuko Mori、Joel W. Beatty、Corey R. J. Stephenson
DOI:10.1021/acscatal.0c03837
日期:2020.11.6
rare example of EDA photochemistry in a catalytic regime. The synthetic utility is demonstrated through visible light-driven radicaltrifluoromethylation and Minisci alkylation reactions. The scalability of the EDA complex-promoted reaction is evidenced by the successful multigram-scale trifluoromethylation of methyl N-Boc pyrrole-2-carboxylate in a continuous flow manifold.
A process for producing an optically active amine compound, characterized by asymmetrically hydrogenating a prochiral carbon-nitrogen double bond in the presence of a ruthenium complex represented by general formula (1) or (2) (wherein P
represents an optically active diphosphine, X represents an anionic group, and Ar represents an optionally substituted arylene group).