A novel double decarboxylative cross-coupling catalyzed by copper and silver has been developed. This method provides a practical approach for the flexible synthesis of alkenes and alkynes from the readily affordable substrates.
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
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.
developed, providing a convenient and efficient approach to enantioenriched trans-1,2-difunctionalized products. The key of the success is the development of a formal late-stage stereomutation strategy, which could enable chiral cis-isomers to be converted into trans-isomer, thus achieving high diastereocontrol.