vital in the fields of synthesis and catalysis. Herein, we describe the application of halogen bonding interactions to facilitate the reaction balance between an electron donor–acceptor (EDA) complex and Ph2Se2 for the synthesis of a series of organoselenium compounds. The EDA complex concept has recently emerged as an attractive path for visible light-inducedtransformations due to facile reaction
非共价相互作用在许多有机和生化过程中发挥着重要作用,包括氢键和卤素键,它们在合成和催化领域至关重要。在此,我们描述了应用卤素键相互作用来促进电子供体-受体(EDA)络合物和Ph 2 Se 2之间的反应平衡,以合成一系列有机硒化合物。由于反应条件简单且无需使用光催化剂,EDA 复合物概念最近已成为可见光诱导转化的一条有吸引力的途径。密度泛函理论计算表明,碘-π*相互作用导致N- (酰氧基)邻苯二甲酰亚胺酯形成烷基自由基。生成的烷基被二硒化物-I•络合物捕获,形成C-Se 键。所开发的硒化物合成策略已应用于伯、仲、叔羧酸以及一系列天然产物、药物和α-硒氨基酸的转化。
Bioinspired zinc-mediated umpolung thiolation of alkyl electrophiles: reaction development, scope and mechanism
Zinc-promoted umpolung thiolation of alkyl electrophiles with masked sulfur transfer reagents in the absence of nickel or copper catalysis is described. This protocol proceeds via a SET process of Zn to electrophilic sulfur reagent followed by insertion of Zn into disulfide and nucleophilic thiolation, providing straightforward access to a wide range of alkyl sulfides with broad substrate scope. A
描述了在没有镍或铜催化的情况下,使用掩蔽硫转移试剂对烷基亲电子试剂进行锌促进的还原硫醇化。该方案通过Zn 与亲电硫试剂的 SET 过程进行,然后将 Zn 插入二硫化物和亲核硫醇化,从而可以直接获得具有广泛底物范围的各种烷基硫醚。合成、分离并通过 NMR、IR 和 X 射线分析充分表征了具有四面体几何形状的中性 TMEDA 连接的四配位硫醇锌。更重要的是,这种活性中间体的化学反应性已经得到研究,能够构建 C-SE、C-Te、Sb-S 和 Bi-S 键,以制备有价值的含硫分子等。