One-Pot, Two-Step, Microwave-Assisted Palladium-Catalyzed Conversion of Aryl Alcohols to Aryl Fluorides via Aryl Nonaflates
摘要:
A convenient procedure for converting aryl alcohols to aryl fluorides via aryl nonafluorobutylsulfonates (ArONf) is presented. Moderate to good one-pot, two-step yields were achieved by this nonaflation and microwave-assisted, palladium-catalyzed fluorination sequence. The reductive elimination step was investigated by DFT calculations to compare fluorination with chlorination, proving a larger thermodynamic driving force for the aryl fluoride product. Finally, a key aryl fluoride intermediate for the synthesis of a potent HCV NS3 protease inhibitor was smoothly prepared with the novel protocol.
Cyanation of Arenes via Iridium-Catalyzed Borylation
作者:Carl W. Liskey、Xuebin Liao、John F. Hartwig
DOI:10.1021/ja104442v
日期:2010.8.25
We report a method to conduct one-pot meta cyanation of arenes by iridium-catalyzed C-H borylation and copper-mediated cyanation of the resulting arylboronate esters. This process relies on a method to conduct the cyanation of arylboronic esters, and conditions for this newtransformation are reported. Conditions for the copper-mediated cyanation of arylboronic acids are also reported. By the resulting
Dual Ligand-Enabled Nondirected C–H Cyanation of Arenes
作者:Hao Chen、Arup Mondal、Philipp Wedi、Manuel van Gemmeren
DOI:10.1021/acscatal.8b04639
日期:2019.3.1
structural units in organic chemistry and, therefore, highly attractive targets for C–Hactivation. Herein, the development of an arene-limited, nondirectedC–H cyanation based on the use of two cooperatively acting commercially available ligands is reported. The reaction enables the cyanation of arenes by C–Hactivation in the absence of directing groups and is therefore complementary to established
The present invention provides compounds for treating or preventing an HIV infection, or treating AIDS or ARC comprising administering a compound according to formula I where Ar, R
1
-R
5
, R
7a
, R
7b
, R
7c
, R
8
-R
10
, X
1
, X
2
m, n, o and p are as defined herein.
The present invention provides compounds for treating or preventing an HIV infection, or treating AIDS or ARC comprising administering a compound according to formula I where Ar, R
1
-R
5
, R
11c
and X
1
are as defined herein.
1,4-Dicarbofunctionalization of 4-Fluoroaryl Grignard and Lithium Reagents with Disubstituted Malononitriles
作者:Christian A. Malapit、Irungu K. Luvaga、Jonathan T. Reeves、Ivan Volchkov、Carl A. Busacca、Amy R. Howell、Chris H. Senanayake
DOI:10.1021/acs.joc.7b00567
日期:2017.5.5
efficient one-pot 1,4-dicarbofunctionalization of 4-fluoroaryl Grignard or lithium reagents with 2,2-disubstituted malononitriles is described. The reaction proceeds by sequential transnitrilation and SNAr reactions. Commercial Grignard solutions, Grignardreagents prepared in situ by halogen/magnesium exchange with i-PrMgCl, or aryllithium reagents prepared in situ by bromine/lithium exchange with n-BuLi