An efficient and environmentally benign Cu-mediated method was developed for direct cascadeC–H/N–H annulation to construct polyheterocyclic indoloquinoline scaffolds. This method highlights an emerging strategy for transforming inert C–H bonds into versatile functional groups in organic synthesis and provides a new versatile approach for the efficient synthesis of indolo[3,2-c] and [2,3-c]quinoline
开发了一种高效且环境友好的铜介导的方法,用于直接级联C–H / N–H环化,以构建多杂环吲哚并喹啉支架。该方法突出了在有机合成中将惰性C–H键转变为通用官能团的新兴策略,并为有效合成吲哚[3,2- c ]和[2,3- c ]喹啉生物碱提供了新的通用方法。
Synthesis of <i>o</i>-Aryloxy Triarylsulfonium Salts via Aryne Insertion into Diaryl Sulfoxides
The aryneinsertion into “S═O” bond has been validated recently. This technology is elusively applied to the synthesis of thioethers. In contrast to the reported cases, the reaction described furnished o-aryloxy triarylsulfonium salts, in lieu of thioethers, in good to excellent yields. The reaction is also featured by its exquisite regioselectivity, broad substrate scope, and mild conditions (25 °C)
2,3-Diaroyl benzofurans from arynes: sequential synthesis of 2-aroyl benzofurans followed by benzoylation
作者:Kashmiri Neog、Babulal Das、Pranjal Gogoi
DOI:10.1039/c8ob00631h
日期:——
strategy for the direct synthesis of 2-aroyl benzofuransfrom aryne precursors has been developed. This reaction proceeds via C–O and C–C bond cleavage as well as C–O and C–C bond formation in a single reaction vessel. The methodology provides good yields of 2-aroyl benzofurans and tolerates a variety of functional groups. The synthesized 2-aroyl benzofurans were further benzoylated at 3-positions and
Thiophenols as Protic Nucleophilic Triggers in Aryne Three-Component Coupling
作者:Subrata Bhattacharjee、Avishek Guin、Rahul N. Gaykar、Akkattu T. Biju
DOI:10.1021/acs.orglett.0c03494
日期:2020.11.20
The synthetic potential of thiophenols as a protic nucleophilic trigger in the transition-metal-free and Grignard-reagent-free three-component coupling involvingarynes is demonstrated. Employing aldehydes as the third component, the reaction allowed the mild and broad scope synthesis of 2-arylthio benzyl alcohol derivatives in good yields. Moreover, selenophenol could be used as the nucleophilic trigger
Multicomponent Reactions Involving Arynes, Quinolines, and Aldehydes
作者:Anup Bhunia、Digvijay Porwal、Rajesh G. Gonnade、Akkattu T. Biju
DOI:10.1021/ol4023134
日期:2013.9.6
The multicomponentreaction involving arynes, quinolines, and aldehydes leading to the diastereoselective synthesis of benzoxazino quinoline derivatives in good yields proceeding via 1,4-zwitterionic intermediates is reported. In addition, the synthetic potential of various carbonyl compounds in this reaction as well as the utility of isoquinoline as the nucleophilic trigger has been examined.