Synthesis of Iron Hydrides by Selective C–F/C–H Bond Activation in Fluoroarylimines and Their Applications in Catalytic Reduction Reactions
作者:Lin Wang、Hongjian Sun、Xiaoyan Li
DOI:10.1002/ejic.201500313
日期:2015.6
(13) and 2,6-F2C6H3–C(=NH)–C6F5 (16) to synthesize iron hydrides (15 and 18). The hydridoiron complexes could be utilized as efficient catalysts in the hydrosilylation of aldehydes and ketones. Furthermore, cinnamaldehydes were selectively reduced to the corresponding cinnamyl alcohols in high yields. The mechanism of the catalytic reduction reaction was studied extensively through operando IR spectroscopy
研究了 Fe(PMe3)4 与不同的 2,6-二氟苯芳基亚胺 1-5 的反应。氟芳基亚胺 1-3,其芳环被吸电子基团取代,与 Fe(PMe3)4 反应得到 C-H 活化产物 6-8。然而,如果氟芳基亚胺的芳环被给电子基团取代,则铁氢化物 9 和 10 是由氟芳基亚胺与 Fe(PMe3)4 通过 C-F 键活化反应得到的。在进一步的研究中,发现硅烷,尤其是三乙氧基硅烷有利于反应并提高氢化铁配合物的产率。Fe(PMe3)4、氟芳基亚胺和硅烷的三组分反应也可用于涉及 2,6-(CH3)2C6H3–C(=NH)–2,6-F2C6H3 (13) 和 2 ,6-F2C6H3–C(=NH)–C6F5 (16) 合成氢化铁(15 和 18)。氢化铁配合物可用作醛和酮氢化硅烷化的有效催化剂。此外,肉桂醛以高产率选择性还原为相应的肉桂醇。通过操作红外光谱广泛研究了催化还原反应的机理。