Base-Mediated Intermolecular sp<sup>2</sup> C−H Bond Arylation via Benzyne Intermediates
作者:Thanh Truong、Olafs Daugulis
DOI:10.1021/ja200184b
日期:2011.3.30
A transition-metal-free method for arylation of heterocycle and arene carbon-hydrogen bonds by aryl chlorides and fluorides has been developed. The reactions proceed via aryne intermediates and are highly regioselective with respect to the C-H bond coupling component.
Disclosed herein are compounds of Formula (I) that include a sulfonate ester, ester or ether group. Compounds of Formula (I) can be included in pharmaceutical compositions, and can be used to treating and/or ameliorating a disease or condition, such as cancer, a microbial disease and/or inflammation.
Synthesis of Functionalized Aryl Fluorides Using Organolithium Reagents in Flow Microreactors
作者:Aiichiro Nagaki、Yuki Uesugi、Heejin Kim、Jun-ichi Yoshida
DOI:10.1002/asia.201201191
日期:2013.4
Flow on: Flowmicroreactors enable the generation of aryl lithium compounds and subsequent electrophilic fluorination with NFSI and N‐fluorosultam. The reaction can be successfully accomplished to synthesize various aryl fluorides involving an electron‐withdrawing, an electron‐donating, and a sterically hindered functional group in good yields.
Copper-Catalyzed <i>ipso</i>-Borylation of Fluoroarenes
作者:Takashi Niwa、Hidenori Ochiai、Takamitsu Hosoya
DOI:10.1021/acscatal.7b01448
日期:2017.7.7
studies suggest that the reaction proceeds via an SRN1mechanism involving a single-electron-transfer (SET) process and not via the typical SNAr mechanism. This method differs from the previously reported nickel/copper-cocatalyzed system in terms of scope of the substrate and has exhibited good scalability. Double and triple ipso-borylations of several di- and trifluoroarenes have been also achieved
本位fluoroarenes的-Borylation已经使用空气稳定的铜配合物作为催化剂来实现的。机理研究表明,反应是通过涉及单电子转移(SET)过程的S RN 1机理而不是通过典型的S N Ar机理进行的。该方法在基材范围方面与先前报道的镍/铜共催化体系不同,并且具有良好的可扩展性。双重和三重IPSO几个二和trifluoroarenes的-borylations也已被有效地实现,从而提高了该方法的综合效用。
Convenient preparations of t-butyl esters and ethers from t-butanol
作者:Stephen W. Wright、David L. Hageman、Ann S. Wright、Lester D. McClure
DOI:10.1016/s0040-4039(97)01792-9
日期:1997.10
A one-pot preparation of t-butylesters and ethers is described that proceeds from the carboxylic acid or alcohol and t-butanol using only anhydrous magnesium sulfate and catalytic sulfuric acid as additional reagents. The method affords t-butylesters and ethers in good yields and is applicable to a variety of substrates.