[Cp*Rh<sup>III</sup>
] in an Ionic Liquid as a Highly Efficient and Recyclable Catalytic Medium for Regio- and Diastereoselective Csp<sup>3</sup>
-H Carbenoid Insertion
A bidentate‐assisted Csp3–H bond insertion using Cp*RhIII/IL as a highlyefficient and recyclable catalytic medium is reported. The application of ionicliquid not only lowered the temperature, but also enhanced the diastereoselectivity of this reaction. This work significantly expanded the scope of ionicliquids in Csp3–H functionalizations
据报道,使用Cp * Rh III / IL作为高效且可回收的催化介质,可进行双齿辅助的Csp 3 -H键插入。离子液体的应用不仅降低了温度,而且提高了该反应的非对映选择性。这项工作大大扩展了Csp 3 -H官能化中离子液体的范围
Palladium-Catalyzed Alkenylation and Alkynylation of <i>ortho</i>-C(sp<sup>2</sup>)–H Bonds of Benzylamine Picolinamides
作者:Yingsheng Zhao、Gang He、William A. Nack、Gong Chen
DOI:10.1021/ol301214u
日期:2012.6.15
An efficient functionalization of ortho-C(sp2)–H bonds of picolinamide (PA)-protected benzylamine substrates with a range of vinyl iodides as well as acetylenic bromide is reported. ortho-Phenyl benzoic acid (oPBA) acts as an effective promoter in this reaction system. This method provides a practical strategy to access highly functionalized benzylamine compounds for organic synthesis.
Cobalt‐Mediated Decarboxylative/Desilylative C−H Activation/Annulation Reaction: An Efficient Approach to Natural Alkaloids and New Structural Analogues
A Co(II)- mediated decarboxylative/desilylative C−H activation/annulation reaction for the synthesis of 3-arylisoquinoline derivatives has been developed with a good functional group tolerance and wide applications.
Synthesis of 2,3-Fused Indoline Aminals <i>via</i>
4 + 2 Cycloaddition of NH-free Benzazetidines with Indoles
作者:Zibo Bai、Huarong Tong、Hao Wang、Gong Chen、Gang He
DOI:10.1002/cjoc.201800483
日期:2019.2
benzazetidines with indoles under the catalysis of camphorsulfonic acid was developed. This method shows a broad substrate scope of benzazetidines and indoles, and offers a convenient method for stereoselective synthesis of various cis‐2,3‐fused indoline aminals. Preliminary mechanistic studies suggest the reaction proceed via a stepwise pathway featuring an electrophilicattack on the benzylic carbon
method for N-heterocycle synthesis. However, the way to control the reactivity of high-valent Pd intermediates to form the desired C−N cyclized products selectively remains poorly addressed. Herein we report a strategy to control the reductive elimination (RE) pathways in high-valent Pd catalysis and apply this strategy to achieve the synthesis of highly strained four-membered benzazetidines via the