具有两个σ-供体/π-受体配体(腈和CO)的自中继铑(I)催化的炔-叠氮化物的环化反应通过串联氮转化和氮杂-Pauson-Khand环化反应依次形成多重稠合杂环系统已开发。在这种方法中,观察到了一种优于CO的有趣的异腈化学选择性插入过程。该反应提供了合成功能化吡咯并[2,3- b ]吲哚支架的替代策略。
Transition-metal-free, visible-light induced cyclization of arylsulfonyl chlorides with o-azidoarylalkynes: a regiospecific route to unsymmetrical 2,3-disubstituted indoles
作者:Lijun Gu、Cheng Jin、Wei Wang、Yonghui He、Guangyu Yang、Ganpeng Li
DOI:10.1039/c6cc10305g
日期:——
A visible-light-catalyzed synthesis of unsymmetrical 2,3-diaryl-substituted indoles from arylsulfonyl chlorides and o-azidoarylalkynes at room temperature has been discovered. This transformation exhibits excellent substrate scope and functional group tolerance. The use of inexpensive eosin Y as the catalyst with easy operation makes this protocol very practical.
Synthesis of <i>N</i>
-Fused Seven-Membered Indoline-3-ones <i>via</i>
a Palladium-Catalyzed One-Pot Insertion Reaction from 2-Alkynyl Arylazides and Cyclic <i>β</i>
-Diketones
A novel insertion reaction of cyclic C‐acylimines into cyclic β‐diketones to construct N‐fused seven‐membered multifunctional polycyclic indoline‐3‐one derivatives has been described, which has shown good tolerance of various functional groups. The corresponding products were obtained in moderate to good yields under mild reaction conditions.
Synthesis of 3-((trifluoromethyl)thio)indoles via trifluoromethylthiolation of 2-alkynyl azidoarenes with AgSCF3
作者:Jongkonporn Phetcharawetch、Nolan M. Betterley、Vichai Reutrakul、Darunee Soorukram、Pawaret Leowanawat、Chutima Kuhakarn
DOI:10.1016/j.jfluchem.2021.109878
日期:2021.10
of 2-alkynyl azidoarenes with silver(I) trifluoromethanethiolate (AgSCF3) has been developed for the construction of 3-((trifluoromethyl)thio)indoles. The trifluoromethylthiolation protocol is compatible with a broad substrate scope, providing a variety of 3-((trifluoromethyl)thio)indoles in moderate to good yields within one step, open-air, and short reaction time.
One-pot synthesis of 3-hydroxy-2-oxindoles <i>via</i> acyloin rearrangements of 2-hydroxy-indolin-3-ones generated <i>in situ</i> from 2-alkynyl arylazides
A novel one-pot method to prepare 3-hydroxy-2-oxindoles via acyloin rearrangements of 2-hydroxy-indolin-3-ones generated in situ from 2-alkynyl arylazides has been described. The reaction was accomplished to afford a variety of 3-hydroxy-2-oxindole derivatives in moderate to good yields under mild conditions.
A new, selective method for the synthesis of 4-haloisoquinolines and 3-haloindoles is presented by the halopalladation cyclizations of alkynes with azides. In the presence of PdX2 (X = Br, Cl) and halide sources, a variety of 2-alkynylbenzylazides or 2-alkynyl aryl azides smoothly underwent the halopalladation cyclization reaction to afford the corresponding 3-substituted 4-haloisoquinolines and