A concise synthesis of 1‐naphthols via cyclization of o‐iodoacetophenones and methyl ketones has been realized under very mild conditions. The cyclization process is initiated by a rare copper‐catalyzed arylation of simple methyl ketones with ortho‐iodoacetophenones.
Copper-catalyzed 1,1-arylalkylation of terminal alkynes with diazo esters and organoboronic acids
作者:Yunhe Lv、Weiya Pu、Xueru Liu、Jinye Sun、Mengxing Cui
DOI:10.1039/c9cc07461a
日期:——
A novel copper-catalyzed 1,1-arylalkylation of terminal alkynes with diazo esters and organoboronicacids is described. With this methodology, (E)-β-aryl-β,γ-unsaturated esters can be easily constructed in good to excellent yields directly from readily available and inexpensive traditional coupling reagents.
Tandem carbon–carbon bond insertion and intramolecular aldol reaction of benzyne with aroylacetones: novel formation of 4,4′-disubstituted 1,1′-binaphthols
An efficient route to 4-aryl-2-naphthols from arynes and aroylacetones was developed by carbon-carbon bond insertion followed by an intramolecular aldol reaction and dehydration. Benzyne derived from 2-(trimethylsilyl)phenyl triflate reacted with benzoylacetones in refluxing acetonitrile to give 4-aryl-2-naphthols and 3-aryl-1-naphthols.
Selective construction of polycyclic spirooxindoles via a Cu(OTf)<sub>2</sub>/HOTf-catalyzed domino reaction of o-arylalkynylacetophenones and 3-phenacylideneoxindoles
作者:Ren-Yin Yang、Jing Sun、Qiu Sun、Chao-Guo Yan
DOI:10.1039/c7ob01292f
日期:——
Under the combined catalysis of Cu(OTf)2/HOTf, the domino annulation reaction ofo-arylalkynyl acetophenones with 3-phenacylideneoxindoles in refluxing acetonitrile selectively afforded functionalized spiro[indoline-3,7′-tetrapheno[7,6-bc]furans].