开发了金(I)催化的加氢胺化/环化异构化级联反应,从2-乙炔基色酰胺中产生吲哚并[8,7- b ]吲哚和吲哚[2,3- a ]-喹嗪衍生物。通过条件筛选确定了最佳条件,并根据合成底物探索了这些反应的官能团耐受性。通过密度泛函理论计算,深入了解了闭环选择性的解释。提出了级联反应的合理机制。吲哚并[8,7- b ]吲哚的衍生化和诺环定的全合成证明了该策略的实用性。
Palladium‐Catalyzed Decarboxylative Alkynylation of α‐Acyloxyketones by C(sp
<sup>3</sup>
)−O Bond Cleavage
作者:Ryohei Doi、Akimasa Yabuta、Yoshihiro Sato
DOI:10.1002/chem.201900582
日期:2019.4.23
Palladium‐catalyzeddecarboxylativealkynylation of α‐acyloxyketones triggered by C(sp3)−Obondcleavage is disclosed. The decarboxylation strategy featuring a neutral reaction condition enabled an unprecedent catalytic alkynylation of a ketone enolate. The reaction was applied to a variety of substrates, giving desired products in good yields. We successfully obtained X‐ray crystallography of a new
Synthesis of the Azocino[cd]indole Framework through Pd-Catalyzed Intramolecular Acetylene Hydroarylation
作者:Vsevolod A. Peshkov、Sofie Van Hove、Pavel A. Donets、Olga P. Pereshivko、Kristof Van Hecke、Luc Van Meervelt、Erik V. Van der Eycken
DOI:10.1002/ejoc.201001669
日期:2011.4
The regio- and stereoselective construction of the azocino[cd]indole core was achieved by applying a Pd-catalyzed intramolecular acetylene hydroarylation protocol. The applicability of a similar strategy for the synthesis of the azepino[b]indole framework is demonstrated.
Gold(<scp>i</scp>)-catalyzed pathway-switchable tandem cycloisomerizations to indolizino[8,7-<i>b</i>]indole and indolo[2,3-<i>a</i>]quinolizine derivatives
作者:Chengjun Liu、Zenghui Sun、Fukai Xie、Guoduan Liang、Lu Yang、Yaqiao Li、Maosheng Cheng、Bin Lin、Yongxiang Liu
DOI:10.1039/c9cc05667j
日期:——
Experimental and theoretical explorations were performed on the pathways of the cascade cycloisomerizations of tryptamine-N-ethynylpropiolamide substrates. The methodology provided a common strategy to access either indolizino[8,7-b]indoles or indolo[2,3-a]quinolizines in a switchable fashion.
对色胺-N-乙炔基丙酰胺酰胺底物的级联环异构化的途径进行了实验和理论探索。该方法学提供了一种通用策略,可以以可切换的方式访问吲哚并[ 8,7- b ]吲哚或吲哚[2,3- a ]喹啉。
Regioselective Pd-Catalyzed Carbopalladation/Decarboxylative Allylic Alkynylation of <i>ortho</i>-Iodoallenamides with Alkynyl Carboxylic Acids
作者:Jonathan Hédouin、Vincent Carpentier、Romain M. Q. Renard、Cédric Schneider、Isabelle Gillaizeau、Christophe Hoarau
DOI:10.1021/acs.joc.9b01408
日期:2019.8.16
A regioselective Pd-catalyzed domino carbopalladation/decarboxylative allylicalkynylation of ortho-iodoallenamides with alkynyl carboxylic acids was studied. This domino process, based on the consecutive formation of C(sp2)–C(sp2) and C(sp3)–C(sp) bonds, was originally achieved for the design of a novel library of prop-2-ynyl isoquinolinones and then extended to indoles. Finally, a general three-step
Ruthenium-Catalyzed Asymmetric [2 + 2] Cycloadditions between Chiral Acyl Camphorsultam-Substituted Alkynes and Bicyclic Alkenes
作者:Jordan Goodreid、Karine Villeneuve、Emily Carlson、William Tam
DOI:10.1021/jo501594g
日期:2014.11.7
Ruthenium-catalyzedasymmetric [2 + 2] cycloadditionsbetweenchiralacyl camphorsultam-functionalized alkynes and bicyclicalkenes were examined, providing adducts with complete exo stereoselectivity in good overall yield and enantioselectivity (up to 99% and 166:1, respectively), as well as appreciable diastereoselectivity (up to 163:1). The diastereoselectivity showed dependence on the solvent and