Samarium(III)-Catalyzed C(sp<sup>3</sup>)–H Bond Activation: Synthesis of Indolizines<i>via</i>C–C and C–N Coupling between 2-Alkylazaarenes and Propargylic Alcohols
A new rareearth metal and samarium-catalyzed C(sp3)–H bond activation is reported in which 2-alkylazaarenes and propargylic alcohols were converted to indolizines. This process operates under mild conditions and solvent-free conditions. A broad scope of coupling partners has been established, and a likely mechanism has also been suggested.