Scope and Limitations of Auxiliary-Assisted, Palladium-Catalyzed Arylation and Alkylation of sp<sup>2</sup> and sp<sup>3</sup> C–H Bonds
作者:Enrico T. Nadres、Gerson Ivan Franco Santos、Dmitry Shabashov、Olafs Daugulis
DOI:10.1021/jo4013628
日期:2013.10.4
auxiliary-assisted direct arylation and alkylation of sp2 and sp3 C–H bonds of amine and carboxylic acid derivatives has been investigated. The method employs a palladium acetate catalyst, substrate, aryl, alkyl, benzyl, or allyl halide, and inorganic base in tert-amyl alcohol or water solvent at 100–140 °C. Aryl and alkyl iodides as well as benzyl and allyl bromides are competent reagents in this transformation
Palladium-catalyzed unactivated β-methylene C(sp<sup>3</sup>)–H bond alkenylation of aliphatic amides and its application in a sequential C(sp<sup>3</sup>)–H/C(sp<sup>2</sup>)–H bond alkenylation
作者:Gang Shan、Guiyi Huang、Yu Rao
DOI:10.1039/c4ob02389g
日期:——
palladium(II)-catalyzed β-methylene C(sp3)–H bondalkenylation of acyclic aliphatic amides with alkenyl halides has been developed. Both (E)-olefins and (Z)-olefins can be readily accessed using this method and a possible (Z)/(E)-olefin isomerization pathway is proposed. A solvent effect-promoted sequential C(sp3)–H bondalkenylation and C(sp2)–H bondalkenylation was also studied, and can provide a
We report the synthesis of carbazole-based unnatural α-aminoacid and non-α-amino acid derivatives via a Pd(II)-catalyzed bidentate directing group 8-aminoquinoline-aided β-C(sp3)–H activation/functionalization method. Various N-phthaloyl, DL-, L- and D-carboxamides derived from their corresponding α-aminoacids, non-α-amino acids and aliphatic carboxamides were subjected to the β-C(sp3)–H functionalization