Catalyst-Controlled Wacker-Type Oxidation of Protected Allylic Amines
作者:Brian W. Michel、Jessica R. McCombs、Andrea Winkler、Matthew S. Sigman
DOI:10.1002/anie.201004156
日期:——
contrary: Utilizing the [Pd(quinox)]–TBHP catalyst system, protectedallylicamines were oxidized with high selectivity for the methyl ketone product. This is contrary to the results obtained by the substrate‐controlled Tsuji–Wacker oxidation, which highlights the catalyst‐controlled system presented here (see scheme). A variety of N‐protecting groups undergo selective oxidation with high ketone selectivity
相反:利用 [Pd(quinox)]-TBHP 催化剂体系,受保护的烯丙胺被氧化,具有高选择性,生成甲基酮产物。这与通过底物控制的 Tsuji-Wacker 氧化获得的结果相反,这突出了此处介绍的催化剂控制系统(参见方案)。各种 N 保护基团以高酮选择性进行选择性氧化。TBHP=叔丁基过氧化氢。
Anti-Markovnikov Hydroalkylation of Allylic Amine Derivatives via a Palladium-Catalyzed Reductive Cross-Coupling Reaction
作者:Ryan J. DeLuca、Matthew S. Sigman
DOI:10.1021/ja204080s
日期:2011.8.3
Palladium-catalyzed hydroalkylation of allylic amine derivatives by alkylzinc reagents is reported. This reductive cross-coupling reaction yields anti-Markovnikov products using a variety of allylic amine protecting groups. Preliminary mechanistic studies suggest that a reversible β-hydride elimination/hydride insertion process furnishes the primary Pd-alkyl intermediate, which then undergoes transmetalation
Aldehyde Selective Wacker Oxidations of Phthalimide Protected Allylic Amines: A New Catalytic Route to β<sup>3</sup>-Amino Acids
作者:Barbara Weiner、Alejandro Baeza、Thomas Jerphagnon、Ben L. Feringa
DOI:10.1021/ja902591g
日期:2009.7.15
A newmethod for the synthesis of beta(3)-amino acids is presented. Phthalimide protected allylic amines are oxidized under Wacker conditions selectively to aldehydes using PdCl(2) and CuCl or Pd(MeCN)(2)Cl(NO(2)) and CuCl(2) as complementary catalyst systems. The aldehydes are produced in excellent yields and exhibit a large substrate scope. Beta-amino acids and alcohols are synthesized by oxidation