Light-enabled, AlCl<sub>3</sub>-catalyzed regioselective intramolecular nucleophilic addition of non-nucleophilic alkyls to alkynes
作者:Yanbin Zhang、Ruiwen Jin、Guangxing Pan、Hao Guo
DOI:10.1039/d0cc04636a
日期:——
regioselective intramolecularnucleophilic cyclization of alkynes using non-nucleophilic alkyls as the nucleophile is reported. Upon photoexcitation, o-alkylphenyl alkynyl ketones can be transferred into (E)-photoenols. Thus, a nucleophilic methylene is formed from the non-nucleophilic alkyl. An AlCl3 catalyst can stabilize the (E)-photoenol intermediate and facilitate further intramolecularnucleophilic cyclization
Facile synthesis of 1-naphthols through a copper-catalyzed arylation of methyl ketones with o-bromoacetophenones
作者:Zhen-Bang Lou、Xin-Long Pang、Chao Chen、Li-Rong Wen、Ming Li
DOI:10.1016/j.cclet.2015.07.022
日期:2015.10
Abstract The coupling reactions of simple methyl ketones with o -bromoacetophenones and subsquential cyclization reactions were realized to produce a range of 1-naphthols. These cascade reactions were initiated by a rare Cu-catalyzed arylation reaction of methyl ketones with aromatic bromides.
Chemo‐ and Regioselective Catalyst‐Controlled Carbocyclization of Alkynyl Ketones: Rapid Synthesis of 1‐Indanones and 1‐Naphthols
作者:Liangliang Song、Guilong Tian、Erik V. Van der Eycken
DOI:10.1002/chem.201901860
日期:2019.6.7
A catalyst‐controlled intramolecular carbocyclization of 2‐alkynyl aryl ketones is presented. Under rhodium(III) catalysis, 1‐indanones are formed through 5‐exo‐dig carbocyclizations with exclusive chemo‐, regio‐ and stereoselectivity. When catalyzed by copper(I), 1‐naphthols are obtained through 6‐endo‐dig carbocyclizations with exclusive chemo‐ and regioselectivity.
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.
A Ru(II)-catalyzed coupling of various α-carbonyl phosphoniums with sulfoxoniumylides has been realized for the facile synthesis of 1-naphthols in good to excellent yields. This oxidant-free transformation proceeds through Ru-catalyzed C–H activation of phosphoniums, Ru-carbene insertion, and intramolecular Wittig reaction processes.