Direct Synthesis of Mono-α-arylated Ketones from Alcohols and Olefins via Ni-Catalyzed Oxidative Cross-Coupling
作者:Peng-Fei Yang、Wei Shu
DOI:10.1021/acs.orglett.0c02340
日期:2020.8.7
Controlled synthesis of α-monoarylated ketones is significant yet challenging due to the site-selectivity issues and nonproductive overarylation reactions. Herein, we reported the direct synthesis of α-arylated ketones enabled by Ni-catalyzed dehydrogenative cross-coupling reaction cascade between alcohols and olefins. The use of readily available and cost-effective alcohols and olefins provides a
Electron transfer reduction of unactivated esters using SmI2–H2O
作者:Michal Szostak、Malcolm Spain、David J. Procter
DOI:10.1039/c1cc14014k
日期:——
The reduction of unactivated esters using samariumdiiodide is reported for the first time. The optimised protocol allows for the reduction of primary, secondary and tertiary alkyl esters in excellent yields and is competitive with reductions mediated by metal hydrides and alkali metals.
Pentafluorophenyl Esters: Highly Chemoselective Ketyl Precursors for the Synthesis of α,α-Dideuterio Alcohols Using SmI<sub>2</sub> and D<sub>2</sub>O as a Deuterium Source
作者:Hengzhao Li、Yuxia Hou、Chengwei Liu、Zemin Lai、Lei Ning、Roman Szostak、Michal Szostak、Jie An
DOI:10.1021/acs.orglett.9b04383
日期:2020.2.21
We report the first highly chemoselective synthesis of α,α-dideuterio alcohols with exquisite incorporation of deuterium (>98% [D2]) using pentafluorophenyl esters as ketyl radical precursors, SmI2 as a mild reducing agent, and D2O as the deuterium source. This system tolerates a variety of functional groups, offering rapid entry to valuable α,α-dideuterated alcohol building blocks. More generally
α-dideuterio alcohols from carboxylic acid esters. Sodium dispersions are used as the electron donor in this electron transfer reaction, and ethanol-d1 is employed as the deuterium source. This reactionuses stable, cheap, and commercially available reagents, is operationally simple, and results in excellent deuterium incorporation across a broad range of aliphatic esters, which provides an attractive