Buchwald-Hartwig Amination of Aryl Chlorides Catalyzed by Easily Accessible Benzimidazolyl Phosphine-Pd Complexes
作者:Chau So、Fuk Kwong、Kin Chung、Shun Wong、Chi Luk、Zhongyuan Zhou、Chak Lau
DOI:10.1055/s-0031-1290666
日期:2012.5
This study describes the efficacy of benzimidazolyl phosphine ligands, which are easily synthesized from inexpensive and commercially available o-phenylenediamine, 2-bormobenzoic acid, and chlorophosphines, in the Buchwald-Hartwig amination of aryl chlorides. Primary and secondary aromatic/aliphatic amines are effective substrates in this catalytic system. Functional groups such as keto and esters are also compatible. The catalyst loading can be reduced to 0.1 mol% Pd.
PIFA-Promoted, Solvent-Controlled Selective Functionalization of C(sp<sup>2</sup>)–H or C(sp<sup>3</sup>)–H: Nitration via C–N Bond Cleavage of CH<sub>3</sub>NO<sub>2</sub>, Cyanation, or Oxygenation in Water
作者:Chandrashekar Mudithanapelli、Lama Prema Dhorma、Mi-hyun Kim
DOI:10.1021/acs.orglett.9b00751
日期:2019.5.3
CH3NO2) mediated by [bis(trifluoroacetoxy)iodo]benzene (PIFA) is described. The NO2 transfer from CH3NO2 to the aromatic group of the substrate is possible with careful selection of the solvent, NaX, and oxidant. In addition, the solvent-controlled C(sp2)–H functionalization can shift to an α-C(sp3)–H functionalization (cyanation or oxygenation) of the α-C(sp3)–H of cyclic amines.
描述了由[双(三氟乙酰氧基)碘]苯(PIFA)介导的新型硝化作用(通过C(SP 3)–N破坏/ C(SP 2)–N与CH 3 NO 2形成)。的NO 2从CH转印3 NO 2到基板的芳族基团是可能的溶剂,的NaX,和氧化剂的仔细选择。此外,溶剂控制的C(SP 2)-H官能化可转移到一个α-C(SP 3)-H官能的α-C(SP的(氰化或氧合)3)-H的环胺。
Palladium-Catalyzed N-Arylation of Iminodibenzyls and Iminostilbenes with Aryl- and Heteroaryl Halides
作者:Wenliang Huang、Stephen L. Buchwald
DOI:10.1002/chem.201603449
日期:2016.9.26
Compounds containing the iminodibenzyl and iminostilbene ring systems are prevalent in medicinal targets and functional materials. Herein, we report palladium‐catalyzed conditions for the N‐arylation of these ring systems. This protocol could be applied to a variety of (hetero)aryl chloride and bromide substrates, including ones, which are sterically hindered or those containing a variety of functional