TEMPO-catalyzed Aerobic Oxygenation and Nitrogenation of Olefins via C═C Double-Bond Cleavage
作者:Teng Wang、Ning Jiao
DOI:10.1021/ja403824y
日期:2013.8.14
A novel TEMPO-catalyzed aerobic oxygenation and nitrogenation of hydrocarbons via C═C double-bond cleavage has been disclosed. The reaction employs molecular oxygen as the terminal oxidant and oxygen-atom source by metal-free catalysis under mild conditions. This method can be used for the preparation of industrially and pharmaceutically important N- and O-containing motifs, directly from simple and
已经公开了一种通过 C=C 双键裂解的新型 TEMPO 催化的碳氢化合物有氧氧化和氮化。该反应采用分子氧作为末端氧化剂和氧原子源,在温和条件下通过无金属催化进行。该方法可用于直接从简单易得的烃类制备工业和药学上重要的含 N 和 O 基序。
Electrochemical Aerobic Oxygenation and Nitrogenation of Cyclic Alkenes via C═C Bond Cleavage or Oxygenation and Azidation of Open-Chain Alkenes
作者:Yan Zhu、Cong Jiang、Heng Li、Ping Liu、Peipei Sun
DOI:10.1021/acs.joc.2c01293
日期:2022.8.19
electrochemical C═C double-bond cleavage and functionalization of cyclic alkenes for the synthesis of ketonitriles is described. This transformation features environmentally friendly conditions and utilizes relatively safe TMSN3 as the nitrogenation reagent and molecular oxygen as the oxidant. For the open-chain alkenes, the reaction gave 1,2-difunctionalized products. A wide range of cyclic alkenes and open-chain
Acyl radicals: intermolecular and intramolecular alkene addition reactions
作者:Dale L. Boger、Robert J. Mathvink
DOI:10.1021/jo00031a021
日期:1992.2
A full study of the use of phenyl selenoesters as precursors to acyl radicals and their subsequent participation in intermolecular and intramolecular alkene addition reactions is detailed. Primary alkyl-, vinyl-, and aryl-substituted acyl radicals generated by Bu3SnH treatment of the corresponding phenyl selenoesters participate cleanly in intermolecular addition reactions with alkenes bearing electron-withdrawing or radical-stabilizing substituents at rates that exceed those of the potentially competitive decarbonylation or reduction. Similarly, their intramolecular addition to activated or unactivated alkenes proceeds without significant competitive reduction or decarbonylation and at rates generally greater-than-or-equal-to 1 x 10(6) s-1 with some occurring at rates greater-than-or-equal-to 3 x 10(7) s-1. Consistent with their behavior in intermolecular addition reactions, the 5-exo-trig cyclizations of secondary and tertiary alkyl-substituted acyl radicals to an unactivated olefin acceptor may be accompanied by varying degrees of decarbonylation, even under low-temperature free-radical reaction conditions. Studies are presented which suggest that the intramolecular additions of acyl radicals to alkenes under the conditions detailed herein may be regarded as irreversible, kinetically controlled processes which exhibit regioselectivity that is predictable based on well-established empirical rules set forth for the analogous free-radical cyclization reactions of alkyl radicals.
Correction to “TEMPO-catalyzed Aerobic Oxygenation and Nitrogenation of Olefins via C═C Double-Bond Cleavage”