[EN] NOVEL FERROCENE-BASED UNSYMMETRICAL LIGANDS BEARING BULKY DI(ADAMANTLY)PHOSPHINO MOTIF AND THEIR METAL CATALYSTS [FR] NOUVEAUX LIGANDS ASYMÉTRIQUES À BASE DE FERROCÈNE PORTANT UN MOTIF DI(ADAMANTYLE)PHOSPHINO VOLUMINEUX ET LEURS CATALYSEURS MÉTALLIQUES
Homotransmetallation des halogeno-3 pyridines bromees en -2 ou -4 par le n-butyllithium. proposition d'un nouveau mecanisme de telesubstitution du brome
We have shown that the BuLi/LiDMAE reagent promotes the clean and regioselective C2 lithiation of 3- and 4-chloropyridines, while other reagents such as LDA or BuLi/TMEDA lead to classical ortho lithiation products or mixtures of regioisomers. The method was successfully applied to the preparation of various reactive 2,3- and 2,4-disubstituted pyridines.
Tunable Unsymmetrical Ferrocene Ligands Bearing a Bulky Di-1-adamantylphosphino Motif for Many Kinds of C<sub>sp<sup>2</sup></sub>–C<sub>sp<sup>3</sup></sub> Couplings
作者:Guolin Xu、Peng Gao、Thomas J. Colacot
DOI:10.1021/acscatal.2c00352
日期:2022.5.6
MALLET M.; QUEGUINER G., TETRAHEDRON, 42,(1986) N 8, 2253-2262