α‐Functionalisation of Cyclic Sulfides Enabled by Lithiation Trapping
作者:Nico Seling、Masakazu Atobe、Kevin Kasten、James D. Firth、Peter B. Karadakov、Frederick W. Goldberg、Peter O'Brien
DOI:10.1002/anie.202314423
日期:2024.1.8
Lithiation and trapping at convenient temperatures (0/−10 °C) of five cyclicsulfides such as tetrahydrothiophene, tetrahydrothiopyrans and a thiomorpholine enables straightforward α-functionalisation. Trapping with a wide range of electrophiles generates more than 50 diverse α-substituted saturated sulfur heterocycles that are not easily synthesised by the currently available methods. TMEDA=N,N,N′
Synthesis of cyclic sulfides by intramolecular ring opening of epoxides by thiolates generated by nickel complex catalyzed electroreduction of thioacetates
The nickel(II) complex catalyzed electroreduction of thioacetates attached to epoxides provided five- to seven-membered cyclic sulfides in good to high yields by regioselective ring opening of epoxides followed by thioheterocyclization. (C) 2000 Elsevier Science Ltd. All rights reserved.