Activation of Chiral (Salen)TiCl<sub>2</sub> Complex by Phosphorane for the Highly Enantioselective Cyanation of Nitroolefins
作者:Chen Chen、Wen-Biao Wu、Yan-Hong Li、Qiu-Hua Zhao、Jin-Sheng Yu、Jian Zhou
DOI:10.1021/acs.orglett.0c00612
日期:2020.3.6
We report that phosphorane can activate (salen)TiCl2 complex to achieve unprecedented excellent enantioselectivity and a broad substrate scope in the cyanation of nitroolefins. Our cyanating reagent Me2(CH2Cl)SiCN proves to be more active than TMSCN in this reaction, allowing 11 β-aliphatic nitrolefins and 12 β-CF3 nitroolefins (either β-aryl or aliphatic) to work well to give the corresponding tertiary
我们报道磷烷可以激活(salen)TiCl2络合物,以实现前所未有的出色对映选择性和硝基烯烃氰化反应中广泛的底物范围。我们的氰化试剂Me2(CH2Cl)SiCN在该反应中被证明比TMSCN具有更高的活性,可以使11个β-脂族硝基烯烃和12个β-CF3硝基烯烃(β-芳基或脂族)很好地起作用,从而生成相应的叔或季β -腈具有高到极好的对映选择性。