Visible-Light-Promoted Metal-Free Aerobic Hydroxyazidation of Alkenes
作者:Bo Yang、Zhan Lu
DOI:10.1021/acscatal.7b02892
日期:2017.12.1
A highly efficient visible-light-promoted metal-free aerobic hydroxyazidation of alkenes has been developed. This protocol was operationally simple with broad substrate scope using relatively simple and readily available starting materials, such as alkenes and air, to construct valuable β-azido alcohols which are significant building blocks to build N-containing compounds. The distinct possible mechanisms
Concurrent Formation of N–H Imines and Carbonyl Compounds by Ruthenium-Catalyzed C–C Bond Cleavage of β-Hydroxy Azides
作者:Jeong Min Lee、Dae Young Bae、Jin Yong Park、Hwi Yul Jo、Eunsung Lee、Young Ho Rhee、Jaiwook Park
DOI:10.1021/acs.orglett.0c01145
日期:2020.6.19
A commercial cyclopentadienylrutenium dicarbonyl dimer ([CpRu(CO)2]2) efficiently catalyzes the formation of N–H imines and carbonyl compounds simultaneously from β-hydroxy azides via C–Cbond cleavage under visible light. Density functional theory calculations for the cleavage reaction support the mechanism involving chelation of alkoxy azide species and liberation of nitrogen as the driving force
a novel approach to high value-added β-azidoalcohols, which are useful precursors of aziridines, β-aminoalcohols, and other important N- and O-containing heterocyclic compounds. This chemistry also provides an unexpected approach to azido substituted cyclic peroxy alcohol esters. A DFT calculation indicates that Mn catalyst plays key dual roles as an efficient catalyst for the generation of azido
已开发出一种用于合成 β-叠氮醇的高效锰催化的烯烃有氧氧化羟基叠氮化反应。公开了以空气为末端氧化剂的叠氮自由基的有氧氧化生成是该转化的关键过程。该反应以其广泛的底物范围、廉价的锰催化剂、高效率、在空气中容易操作以及室温下温和的条件而受到赞赏。这种化学反应为高附加值的 β-叠氮醇提供了一种新方法,它是氮丙啶、β-氨基醇和其他重要的含 N 和 O 杂环化合物的有用前体。这种化学反应还为叠氮取代的环状过氧醇酯提供了一种意想不到的方法。DFT 计算表明,Mn 催化剂作为产生叠氮自由基的有效催化剂和过氧自由基中间体的稳定剂起着关键的双重作用。进一步的计算合理地解释了所提出的控制 CC 键断裂或形成 β-叠氮醇的机制。
Regio- and diastereoselective formation of 1,2-azidohydroperoxides by photooxygenation of alkenes in the presence of azide anions
作者:Axel G. Griesbeck、Thomas Hundertmark、Jörg Steinwascher
DOI:10.1016/0040-4039(96)01932-6
日期:1996.11
1,2-Azidohydroperoxides are accessible from alkenes when irradiated in the presence of azideanions, oxygen and an appropriate sensitizer. The results of substrate/sensitizer variations indicate a reaction initiated by electron transfer to give the sensitizer radical anion and azidyl radicals. The latter efficiently add to alkenes producing carbon radicals which are trapped by molecular oxygen.