Singlet Oxygen Promoted Carbon−Heteroatom Bond Cleavage in Dibenzyl Sulfides and Tertiary Dibenzylamines. Structural Effects and the Role of Exciplexes
作者:Enrico Baciocchi、Tiziana Del Giacco、Osvaldo Lanzalunga、Andrea Lapi
DOI:10.1021/jo701641b
日期:2007.12.1
obtained whereas sulfoxide formation became negligible when the reactions were carried out in the presence of a base. Through a careful product study for the oxidation of dibenzyl sulfide, in the presence and in the absence of Ph2SO, it was established that sulfone and cleavage product (benzaldehyde) do not come by the same route (involving the persulfoxide and the hydroperoxysulfonium ylide) as required
作者:Qing Wang、Xiangzhang Tao、Shengyang Ni、Yi Pan、Yi Wang
DOI:10.1021/acs.orglett.3c02082
日期:2023.8.11
establishing C(sp3)–N bonds from alkyl substrates in cross-couplingchemistry using palladium and nickel catalysts. Therefore, the methods of constructing C(sp3)–N bonds remain rare from alkyl electrophiles. The existing routes are limited to copper catalysis and photoredox catalysis. Here, we demonstrate an alternative amination strategy for rapid construction of C(sp3)–N bonds from accessible alkyl electrophiles
双分子亲核取代S N 2 是烷基亲电试剂胺化最早也是最重要的手段;其实际应用很大程度上限于初级或活化基质。此外,持续的挑战在于使用钯和镍催化剂在交叉偶联化学中从烷基底物建立C(sp 3 )–N键。因此,从烷基亲电子试剂构建C(sp 3 )–N键的方法仍然很少。现有的路线仅限于铜催化和光氧化还原催化。在这里,我们展示了一种替代的胺化策略,用于从可接近的烷基亲电子试剂中快速构建 C(sp 3 )–N 键,该策略在镍催化下通过 Ni (III) 物种高效还原消除用作自由基前体。