Erbium-Catalyzed Regioselective Isomerization–Cobalt-Catalyzed Transfer Hydrogenation Sequence for the Synthesis of Anti-Markovnikov Alcohols from Epoxides under Mild Conditions
作者:Xin Liu、Lars Longwitz、Brian Spiegelberg、Jan Tönjes、Torsten Beweries、Thomas Werner
DOI:10.1021/acscatal.0c03294
日期:2020.11.20
tetra-substituted epoxides (6 examples) are converted. A variety of functional groups are tolerated under the reaction conditions even though aldehydes and ketones are also reduced to the respective alcohols under the reaction conditions. Mechanistic studies and control experiments were used to investigate the role of the Lewis acid in the reaction. Besides acting as the catalyst for the epoxide isomerization
Oxy‐Borylenes as Photoreductants: Synthesis and Application in Dehalogenation and Detosylation Reactions
作者:Philipp Lenz、Ryo Oshimizu、Sina Klabunde、Constantin G. Daniliuc、Christian Mück‐Lichtenfeld、Jonas C. Tendyck、Tatsuya Mori、Werner Uhl、Michael Ryan Hansen、Hellmut Eckert、Shigehiro Yamaguchi、Armido Studer
DOI:10.1002/anie.202209391
日期:2022.10.17
ground-state redox potentials of up to −1.90 V vs. Fc+/0 for those highly reducing oxy-borylenes. Their ability as photoreductants is then showcased by the detosylation of tosylated anilines and the dehalogenation of electron-rich aryl as well as alkyl halides under visible light irradiation.
报道了一系列氧化硼烯及其相应自由基阳离子的合成。循环伏安研究表明,对于那些高度还原性的氧化硼烯,其基态氧化还原电位相对于 Fc +/0高达 -1.90 V。然后,通过在可见光照射下甲苯磺酰化苯胺的去甲苯磺酰化和富电子芳基以及烷基卤化物的脱卤作用,展示了它们作为光还原剂的能力。