Iron-Catalyzed Directed C(sp<sup>2</sup>)–H and C(sp<sup>3</sup>)–H Functionalization with Trimethylaluminum
作者:Rui Shang、Laurean Ilies、Eiichi Nakamura
DOI:10.1021/jacs.5b04818
日期:2015.6.24
Conversion of a C(sp(2))-H or C(sp(3))-H bond to the corresponding C-Me bond can be achieved by using AlMe3 or its air-stable diamine complex in the presence of catalytic amounts of an inorganic iron(III) salt and a diphosphine along with 2,3-dichlorobutane as a stoichiometric oxidant. The reaction is applicable to a variety of amide substrates bearing a picolinoyl or 8-aminoquinolyl directing group
The Pd-catalyzed C–H alkylation of <i>ortho</i>-methyl-substituted aromatic amides with maleimide occurs preferentially at the <i>ortho</i>-methyl C–H bond over the <i>ortho</i>-C–H bond
作者:Qiyuan He、Yusuke Ano、Naoto Chatani
DOI:10.1039/c9cc05321b
日期:——
The reaction of ortho-methyl-substituted aromatic amides with maleimides in the presence of Pd(OAc)2 and AgOAc results in C–H alkylation at the ortho-methyl C–H bond. DFT calculations indicate that the formation of a five-membered palladacycle is a kinetically favorable step, but the insertion of the maleimide into the six-membered palladacycle is energetically favored.
alkylated azobenzene derivativesvia the Pd(II)-catalyzed bidentate directing group (DG)-aided C–H activation and functionalization strategy. In the past, the synthesis of biaryl motif-based azobenzenes was accomplished through the traditional cross-coupling reaction involving organometallic reagents and aryl halides or equivalent coupling partners. We have shown the directcoupling of C–H bonds of aromatic/aliphatic
Pd(II)-Catalyzed Arylation and Intramolecular Amidation of γ-C(sp<sup>3</sup>)–H Bonds: En Route to Arylheteroarylmethane and Pyrrolidone Ring Annulated Furan/Thiophene Scaffolds
作者:Ramarao Parella、Srinivasarao Arulananda Babu
DOI:10.1021/acs.joc.7b00582
日期:2017.7.21
(1a–e) were derived from their corresponding carboxylic acids and bidentate directing groups. These compounds were then used as substrates to investigate the arylation and successive arylation/intramolecular amidation of the γ-C(sp3)–H bonds. The γ-C(sp3)–H arylation arose from the Pd(II)-catalyzed reactions of these compounds with aryl iodides with reaction periods of 4–24 h (except a few reactions