Versatile direct dehydrative approach for diaryliodonium(iii) salts in fluoroalcohol media
作者:Toshifumi Dohi、Motoki Ito、Koji Morimoto、Yutaka Minamitsuji、Naoko Takenaga、Yasuyuki Kita
DOI:10.1039/b708802g
日期:——
We have found that the use of fluoroalcohol media greatly enhanced the efficiency and scope of the direct dehydrative condensation of arenes1 and hypervalent iodine(III) compounds; the present clean method has a broad range of applicability as well as unique selectivity in the aromatic substrates, and is highly efficient even in polymer functionalization.
Substrate or Solvent-Controlled Pd<sup>II</sup>
-Catalyzed Regioselective Arylation of Quinolin-4(1<i>H</i>
)-ones Using Diaryliodonium Salts: Facile Access to Benzoxocine and Aaptamine Analogues
作者:Manish K. Mehra、Shivani Sharma、Krishnan Rangan、Dalip Kumar
DOI:10.1002/ejoc.202000013
日期:2020.5.3
Substrate or solvent controlled regioselective C3, C5, and C8 arylation of quinolin‐4(1H)‐ones with diaryliodoniumsalts have been successfully achieved in high yields (up to 96 %). These protocols are applicable to a wide range of quinolone related heterocycles and provide potential access to naturally occurring benzoxocine and aaptamineanalogues
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.
Facile Preparation of Unsymmetrical Diaryl Ethers from Unsymmetrical Diaryliodonium Tosylates and Phenols with High Regioselectivity
作者:Hideo Togo、Yohji Kakinuma、Katsuhiko Moriyama
DOI:10.1055/s-0032-1316824
日期:——
Abstract Unsymmetrical diaryl ethers were efficiently obtained in good yields by the reactions of aryl(4-methoxyphenyl)iodonium tosylates with phenols, and aryl(2,4-dimethoxyphenyl)iodonium tosylates with phenols, in the presence of potassium carbonate in acetonitrile, respectively. The latter iodonium tosylates provided the corresponding unsymmetrical diaryl ethers in good yields with high regioselectivities
are demonstrated as efficient arylating agents of aliphaticalcohols under metal‐free conditions. The reaction proceeds at roomtemperature within 90 min to give alkyl aryl ethers in good to excellent yields. Aryl groups with electron‐withdrawing substituents are transferred most efficiently, and unsymmetric iodonium salts give chemoselective arylations. The methodology has been applied to the formal