Put a ring on it! The arylation of aliphatic alcohols and hydroxide with diaryliodoniumsalts, to give alkyl aryl ethers and diaryl ethers, has been studied using experimental techniques and DFT calculations. Aryne formation and alcohol oxidation pathways were observed in parallel to arylation, and additives to avoid by-product formation originating from arynes have been found. A novel, direct nucleophilic
Copper-Catalyzed Diastereoselective Arylation of Tryptophan Derivatives: Total Synthesis of (+)-Naseseazines A and B
作者:Madeleine E. Kieffer、Kangway V. Chuang、Sarah E. Reisman
DOI:10.1021/ja4023557
日期:2013.4.17
A copper-catalyzed arylation of tryptophan derivatives is reported. The reaction proceeds with high site- and diastereoselectivity to provide aryl pyrroloindoline products in one step from simple starting materials. The utility of this transformation is highlighted in the five-step syntheses of the natural products (+)-naseseazine A and B.
报道了色氨酸衍生物的铜催化芳基化。该反应以高位点和非对映选择性进行,从简单的起始材料一步即可提供芳基吡咯并二氢吲哚产物。这种转化的效用在天然产物 (+)-naseseazine A 和 B 的五步合成中得到了强调。
Transition Metal‐Free
<i>N‐</i>
Arylation of Amino Acid Esters with Diaryliodonium Salts
A transition metal‐free approach for the N‐arylation of amino acid derivatives has been developed. Key to this method is the use of unsymmetricdiaryliodoniumsalts with anisyl ligands, which proved important to obtain high chemoselectivity and yields. The scope includes the transfer of both electron deficient, electron rich and sterically hindered aryl groups with a variety of different functional
Base-Free Selective <i>O</i>
-Arylation and Sequential [3,3]-Rearrangement of Amidoximes with Diaryliodonium Salts: Synthesis of 2-Substituted Benzoxazoles
作者:Wei-Min Shi、Xiao-Hua Li、Cui Liang、Dong-Liang Mo
DOI:10.1002/adsc.201700906
日期:2017.12.11
of functionalized 2‐substituted benzoxazoles can be prepared in good yields from amidoximes and diaryliodonium salts by selective O‐arylation and sequential [3,3]‐rearrangement under metal‐free conditions. O‐arylation of amidoximes was promoted by 3 Å molecule sieves in the absence of a base and a sequential TFA‐mediated [3,3]‐rearrangement was used to synthesize 2‐substituted benzoxazoles. Both of
Copper-catalysed synthesis of trifluoromethyl(hetero)arenes from di(hetero)aryl-λ<sup>3</sup>-iodanes
作者:Vinay Kumar Pandey、Pazhamalai Anbarasan
DOI:10.1039/c5ra27128b
日期:——
An efficient synthesis of trifluoromethylated (hetero)arenes has been achieved through the regioselective copper-catalyzed trifluoromethylation of di(hetero)aryl-λ3-iodanes, employing readily available trifluoromethyltrimethylsilane. The reaction works well for both symmetrical and unsymmetrical di(hetero)aryl-λ3-iodanes with good regioselectivity and also tolerates diverse functional groups such as