Effect of Electronic Enrichment of NHCs on the Catalytic Activity of [Pd(NHC)(acac)Cl] in Buchwald–Hartwig Coupling
作者:Gaëtan Le Duc、Sébastien Meiries、Steven P. Nolan
DOI:10.1021/om4010143
日期:2013.12.23
electronic and steric effects of NHC ligands in catalysis. Their reactivity in Buchwald–Hartwigcoupling has been explored and compared with that of their nonmethoxylated congeners. Combining the optimal steric and electronic properties, [Pd(IHeptOMe)(acac)Cl] performed excellently in the palladium-catalyzed amination of deactivated aryl chlorides with various anilines.
[EN] SYNTHESES OF N-HETEROCYCLIC CARBENES AND INTERMEDIATES THEREFOR<br/>[FR] SYNTHÈSES DE CARBÈNES N-HÉTÉROCYCLIQUES ET INTERMÉDIAIRES À CET EFFET
申请人:UNIV ST ANDREWS
公开号:WO2014108671A1
公开(公告)日:2014-07-17
A method of preparing a 2,6 disubstituted anilines includes, reacting a 2-amino isophtha!ic acid diester with sufficient Grignard reagent R2CH2MgX to form the corresponding diol product, dehydrating the diol product to the corresponding dialkene; and hydrogenating the diol product to form the corresponding aniline. The 2,6 disubstituted anilines can be used to produce N-Heterocyciic Carbenes (NHCs). The NHCs can find application in various fields such as organic synthesis, catalysis and macromolecular chemistry. Palladium catalysts containing the NHCs are also described.
SYNTHESES OF N-HETEROCYCLIC CARBENES AND INTERMEDIATES THEREFOR
申请人:UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
公开号:US20150361049A1
公开(公告)日:2015-12-17
A method of preparing a 2,6 disubstituted anilines includes, reacting a 2-amino isophthalic acid diester with sufficient Grignard reagent R
2
CH
2
MgX to form the corresponding diol product, dehydrating the diol product to the corresponding dialkene; and hydrogenating the diol product to form the corresponding aniline. The 2,6 disubstituted anilines can be used to produce N-Heterocyciic Carbenes (NHCs). The NHCs can find application in various fields such as organic synthesis, catalysis and macromolecular chemistry. Palladium catalysts containing the NHCs are also described.
Sterically Congested Protecting Group for a Boronyl Group in Iterative Aminations
作者:Takaki Nojiri、Naoki Tsuchiya、Takashi Nishikata
DOI:10.1002/chem.202303953
日期:2024.3.25
The reaction of α-hydroxycarboxamide and aryl boronic acid produces aryl-oxazaborolidinone (Ar-OxB). In Ar-OxB, the α-hydroxycarboxamide-moiety was found to be a good protectinggroup for the boronyl group. This Ar-OxB is effective for Iterative aminations including Chan-Evans-Lam couplings.
Syntheses of N-heterocyclic carbenes and intermediates therefor
申请人:UMICORE AG & CO. KG
公开号:US10759763B2
公开(公告)日:2020-09-01
A method of preparing a 2,6 disubstituted anilines includes, reacting a 2-amino isophthalic acid diester with sufficient Grignard reagent R2CH2MgX to form the corresponding diol product, dehydrating the diol product to the corresponding dialkene; and hydrogenating the diol product to form the corresponding aniline. The 2,6 disubstituted anilines can be used to produce N-Heterocyclic Carbenes (NHCs). The NHCs can find application in various fields such as organic synthesis, catalysis and macromolecular chemistry. Palladium catalysts containing the NHCs are also described.