烯烃的催化胺化是构建具有氮中心的复杂杂环最有吸引力的反应之一。在这里,我们提出协同光氧化还原和钴肟催化允许在没有外部氧化剂的情况下,各种 NH 亲核试剂与二、三和四取代烯烃之间进行高效和温和的脱氢反应,从而能够获得一系列N杂环。值得注意的是,含Z和E烯烃的N杂环都是可以得到的。机理研究表明Z-肉桂基衍生物可以通过光催化E to Z通过能量转移过程进行烯烃异构化。此外,我们发现缓慢的能量转移可以抑制E到Z烯烃异构化过程,从而提供具有E选择性的肉桂基衍生物。我们的结果突出了使用双光氧化还原和钴肟催化反应产生多种N-杂环的好处。
Intramolecular Anodic Olefin Coupling Reactions and the Synthesis of Cyclic Amines
作者:Hai-Chao Xu、Kevin D. Moeller
DOI:10.1021/ja910586v
日期:2010.3.3
Anodic olefin couplingreactions using a tosylamine trapping group have been studied. The cyclizations are favored by the use of a less-polar radical cation and more basic reaction conditions. The most significant factor for obtaining good yields of cyclic product is the use of the more basic reaction conditions. However, a number of factors including the nature of both the solvent and the electrolyte
作者:Nicholas L. Reed、Grace A. Lutovsky、Tehshik P. Yoon
DOI:10.1021/jacs.1c02747
日期:2021.4.28
and exceptionally mild photocatalytic oxidative heterofunctionalization reactions between bulky tri- and tetrasubstituted alkenes and a wide variety of nucleophilic partners. Moreover, we demonstrate that the broad scope of this transformation arises from photocatalytic alkeneactivation and thus complements existing transition-metal-catalyzed methods for oxidative heterofunctionalization. More broadly
Intramolecular Anodic Olefin Coupling Reactions: The Use of a Nitrogen Trapping Group
作者:Hai-Chao Xu、Kevin D. Moeller
DOI:10.1021/ja806259z
日期:2008.10.15
Anodicolefincouplingreactionsusing a tosylamine trapping group have been studied. The cyclizations are favored by the use of a less-polar radical cation and more basic reaction conditions. The most significant factor for obtaining good yields of cyclic product is the use of the more basic reaction conditions. The cyclizations allow for the rapid synthesis of substituted proline derivatives.
materials. Herein we disclose a catalyst‐ and reagent‐free formal aza‐Wacker type cyclization reaction for the synthesis of functionalized saturated N‐heterocycles. Key to the success is to conduct the reactions in a continuous‐flow electrochemical reactor without adding supporting electrolyte or additives. The reactions are characterized by broad tolerance of di‐, tri‐ and tetrasubstituted alkenes.
Pd-Catalyzed Regioselective Intramolecular Allylic C–H Amination of 1,1-Disubstituted Alkenyl Amines
作者:Young Ho Kim、Dong Bin Kim、Su San Jang、So Won Youn
DOI:10.1021/acs.joc.2c00781
日期:2022.6.3
Pd-Catalyzed intramolecular allylic C–H amination of 1,1-disubstituted alkenyl amines with various allylic tethers (X = O, NMs, CH2) was developed. This process allows for the divergent synthesis of 1,3-X,N-heterocycles through a regioselective allylic C–H cleavage and π-allylpalladium formation. Particularly noteworthy is the use of substrates containing a labile allylic moiety and new simple catalytic