Heck-type cross-coupling between halo-exo-glycals and endo-glycals: a practical way to achieve C-glycosidic disaccharides
摘要:
An effective Heck-type cross-coupling reaction between halo-exo-glycals and endo-glycals to achieve C-glycosidic disaccharides has been developed. Using Pd(OAc)(2) as the catalyst, dppp as ligand and K2CO3 as base, the reactions gave C-glycosidic products in good to excellent yields with exclusive stereochemistry. (C) 2013 Elsevier Ltd. All rights reserved.
Combining Transition Metal Catalysis with Radical Chemistry: Dramatic Acceleration of Palladium-Catalyzed CH Arylation with Diaryliodonium Salts
作者:Sharon R. Neufeldt、Melanie S. Sanford
DOI:10.1002/adsc.201200738
日期:2012.12.14
This paper describes a photoredox palladium/iridium-catalyzed C-H arylation with diaryliodonium reagents. Details of the reaction optimization, substrate scope, and mechanism are presented along with a comparison to a related method in which aryldiazonium salts are used in place of diaryliodonium reagents. The unprecedentedly mild reaction conditions (25 masculineC in methanol), the requirement for
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.
Diverse Tandem Cyclization Reactions of <i>o</i>-Cyanoanilines and Diaryliodonium Salts with Copper Catalyst for the Construction of Quinazolinimine and Acridine Scaffolds
Two cyclization modes are realized to produce different nitrogen-containing heterocycles, i.e., quinazolin-4(3H)-imines and acridines by assembling o-cyanoanilines and diaryliodonium salts via tandem reaction pathways.
Metal-Free <i>C</i>-Arylation of Nitro Compounds with Diaryliodonium Salts
作者:Chandan Dey、Erik Lindstedt、Berit Olofsson
DOI:10.1021/acs.orglett.5b02270
日期:2015.9.18
An efficient, mild, and metal-free arylation of nitroalkanes with diaryliodonium salts has been developed, giving easy access to tertiary nitrocompounds. The reaction proceeds in high yields without the need for excess reagents and can be extended to α-arylation of nitroesters. Nitroalkanes were selectively C-arylated in the presence of other easily arylated functional groups, such as phenols and