Access to Perfluoroalkyl-Substituted Enones and Indolin-2-ones via Multicomponent Pd-Catalyzed Carbonylative Reactions
作者:Hongfei Yin、Troels Skrydstrup
DOI:10.1021/acs.joc.7b00942
日期:2017.6.16
A simple method for accessing perfluoroalkyl-substituted enones is described applying a four-component palladium-catalyzed carbonylative coupling of aryl boronic acids together with terminal alkynes and perfluoroalkyl iodides in the presence of carbon monoxide. A wide range of highly functionalized enones can thus be prepared in a single operation in good yields. With 2-aminophenylalkynes, an intramolecular
Hypervalent Iodine-Mediated Intramolecular <i>trans</i>-Aminocarboxylation and Oxoaminocarboxylation of Alkynes: Divergent Cascade Annulations of Isocoumarins under Metal-Free Conditions
作者:Xiang Zhang、Wenjuan Hou、Daisy Zhang-Negrerie、Kang Zhao、Yunfei Du
DOI:10.1021/acs.orglett.5b02611
日期:2015.11.6
An exclusive trans-aminocarboxylation and oxoaminocarboxylation of diarylalkynes were realized through hypervalent iodine-mediated cascadeannulationsundermetal-freeconditions, leading to divergent assembly of fused or spiro polycyclic heterocycles with a dosage of the hypervalent iodine oxidant. The mechanisms for the formation of both products are proposed.
Synthesis of Indole-Fused Polycyclics via Rhodium-Catalyzed Undirected C–H Activation/Alkene Insertion
作者:Songjin Guo、Rui Pan、Zhe Guan、Panpan Li、Libo Cai、Siwei Chen、Aijun Lin、Hequan Yao
DOI:10.1021/acs.orglett.9b02198
日期:2019.8.16
Rh(III)-catalyzed undirected C–H activation/alkeneinsertion to synthesize diversified indole-fused polycyclics has been developed. Intramolecular electrophilic cyclization generated a 3-indolyl rhodium species that went through an aryl-to-aryl 1,4-rhodium migration to realize the C–H activation. The subsequent [4 + 2] carboannulation or hydroarylation of alkenes could be achieved, respectively, by simply
A dramatic enhancing effect of InBr3 was observed towards the oxidative Sonogashira cross-coupling reaction of 2-ethynylaniline with (E)-trimethyl(3,3,3-trifluoroprop-1-enyl)silane.
Synthesis of indolo[1,2-<i>c</i>]quinazolines from 2-alkynylaniline derivatives through Pd-catalyzed indole formation/cyclization with <i>N</i>,<i>N</i>-dimethylformamide dimethyl acetal
An efficient strategy for the synthesis of 6-unsubstituted indolo[1,2-c]quinazolines is described. The Pd-catalyzed reaction of o-(o-aminophenylethynyl) trifluoroacetanilides with Ar-B(OH)2 afforded 2-(o-aminophenyl)-3-arylindoles, that were converted to 12-arylindolo[1,2-c]quinazolines by adding dimethylformamide dimethyl acetal (DMFDMA) to the reaction mixture after extractive work-up. This reaction