10.1002/cctc.201500053
The study presented in the PDF document titled "Dual [Fe+Phosphine] Catalysis: Application in Catalytic Wittig Olefination" focuses on the development and application of a dual catalysis system involving iron hydride complexes and phosphines for the selective reduction of carbonyl and phosphine oxide groups. The researchers explored the use of Fe-based complexes for the hydrosilylation of aldehydes, ketones, and phosphine oxides, demonstrating that these complexes could effectively reduce phosphine oxides to phosphines. This reduction process was then integrated into a catalytic Wittig olefination reaction, which is a synthetically useful transformation for the formation of olefins from aldehydes or ketones and a-halocarboxylic acid esters. The study successfully utilized a readily accessible Fe-H complex in conjunction with triphenylphosphine as an organocatalyst and phenylsilane as a stoichiometric reductant, achieving moderate to good yields of the desired olefination products. This work not only expands the application scope of Fe-based catalysis but also provides a potential avenue for the in situ recycling of phosphines, which is beneficial for large-scale applications and more sustainable chemical processes.
