1-(Methylthio) and 1-(phenylthio)vinyllithiums were prepared by the treatment of the corresponding 2-methoxyethyl sulfides with twice molar amounts of butyllithium in the presence of N,N,N′,N′-tetramethylethylenediamine (TMEDA). β-Alkylthio-β,γ-unsaturated alcohols were obtained in good yields by the reaction of the lithium salts with aldehydes.
An improved procedure for the preparation of 1-(methylthio- and phenylthio)vinyllithium reagents utilizing 2-methoxyalkyl sulfides was developed and their reactions with ketones, aldehydes, oxiranes, and alkyl halides were studied.
Chromium/Photoredox Dual Catalyzed Synthesis of
<i>α</i>
‐Benzylic Alcohols, Isochromanones, 1,2‐Oxy Alcohols and 1,2‐Thio Alcohols
作者:Subhabrata Dutta、Johannes E. Erchinger、Felix Schäfers、Ankita Das、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.202212136
日期:2022.12.5
The synthesis of α-benzylic alcohols, functionalized isochromanones, 1,2-oxy alcohols and 1,2-thio alcohols has been successfully achieved by employing a dual catalytic method combining chromium chemistry and photoredox catalysis. This presents a methodology under mild conditions with high functional group tolerance.