Synthesis of four racemic nicotine isotopomers doubly labelled with stable isotope
作者:Wilfried Hatton、Virginie Silvestre、Richard J. Robins、Monique Mathé-Allainmat、Jacques Lebreton
DOI:10.1002/jlcr.1578
日期:2009.4
into the pyridine moiety by reductivedehalogenation with zinc, and choosing deuterated acetic acid as the acidic medium. Pyridine 2H-labelled nornicotine derivatives were then formed in two reaction steps, a condensation reaction with N-vinylpyrrolidinone followed by catalytic hydrogenation. The deuteromethylation of these monodeuterated nornicotines was achieved by reduction of the corresponding ethyl
Dehalogenative Deuteration of Alkyl and Aryl Bromides by Thiyl Radical Catalysis under Visible-Light Irradiation
作者:Jiin Lee、Sunggi Lee
DOI:10.1039/d4cc00474d
日期:——
Herein, we report a mild and practical method for the deuteration of alkyl and aryl bromides by a thiyl radical catalyst and halogen-atom transfer (XAT) using disulfides and silanes under visible-light irradiation. In this study, various organic bromides such as 1°, 2°, and 3°-alkyl bromides and aryl bromides were converted to deuterated products in good to excellent yields and D-incorporation.
在此,我们报告了一种温和实用的方法,通过硫基自由基催化剂对烷基溴和芳基溴进行氘化,并在可见光照射下使用二硫化物和硅烷进行卤素原子转移(XAT)。在这项研究中,各种有机溴化物(例如 1°、2° 和 3°-烷基溴和芳基溴)被转化为氘代产品,产率和 D 结合率良好至优异。