arylation of allylic and benzylic alcohols with diaryliodoniumsalts is reported. The reaction yields alkyl aryl ethers under mild and metal-free conditions. Phenols are arylated to diaryl ethers in good to excellent yields. The reaction employs diaryliodoniumsalts and sodium hydroxide in water at low temperature, and excess amounts of the coupling partners are avoided.
Ir(I)-Catalyzed Enantioselective Decarboxylative Allylic Etherification: A General Method for the Asymmetric Synthesis of Aryl Allyl Ethers
作者:Dongeun Kim、Srinivasa Reddy、Om V. Singh、Jae Seung Lee、Suk Bin Kong、Hyunsoo Han
DOI:10.1021/ol3033237
日期:2013.2.1
Ir(I)-catalyzed enantioselectivedecarboxylative allylic etherification of arylallylcarbonates provides arylallyl ethers. Key to the generality and high stereoselection of the reaction is the use of the intramolecular decarboxylative allylation process and [Ir(dbcot)Cl]2 as an Ir(I) source. Ir(I)-catalyzed diastereoselective decarboxylative allylic etherification, combined with asymmetric aldehyde
An anionic iron complex catalyzes the decarboxylative allylation of phenols to form allylic ethers in high yield. The allylation is regioselective rather than regiospecific. This suggests that the allylation proceeds through π-allyl iron intermediates in contrast to related allylations of carbon nucleophiles that have been proposed to proceed via σ-allyl complexes. Ultimately, iron catalysts have the
biology and drug development in recent years. Here, we report the development of a radical fluorosulfonylation of alkenes/intramolecular arylation cascade for the construction of chromanes with sulfonyl fluoride groups attached. The radical 1,2-fluorosulfonyl arylation reactions proceed well in both endo and exocyclization fashions, allowing for further variation of the distance between the chromane core
HFIP-promoted halo-carbocyclizations of <i>N</i>- and <i>O</i>-tethered arene–alkene substrates to access all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman cores
作者:Pushpendra Mani Shukla、Aditya Bhattacharya、Aniruddh Pratap、Akash Pradhan、Puspita Sinha、Tanishk Soni、Biswajit Maji
DOI:10.1039/d2ob01597h
日期:——
Herein, a HFIP-promoted mild and efficient method for the synthesis of all halo (X = Br, I, Cl)-functionalized tetrahydroquinoline and chroman building blocks is disclosed.