Pd- and Ni-Catalyzed Cross-Coupling Reactions of Functionalized Organozinc Reagents with Unsaturated Thioethers
作者:Laurin Melzig、Albrecht Metzger、Paul Knochel
DOI:10.1002/chem.201002850
日期:2011.3.1
serve as electrophiles in this cross‐coupling reaction. Aryl‐, heteroaryl‐, benzylic, and alkylzinc halides with sensitive functionalities, such as ester, nitrile, or ketone groups react at ambient temperature with unsaturated thioethers using a Ni catalyst. The corresponding Pd‐catalyzed reactions require slightly higher temperatures. Large‐scale cross‐coupling experiments (10–20 mmol) with N‐heterocycles
A Novel Palladium-Catalyzed Cross-Coupling of Thiomethylated Alkynes with Functionalized Organozinc Reagents
作者:Paul Knochel、Laurin Melzig、Jérémy Stemper
DOI:10.1055/s-0029-1218734
日期:2010.6
A range of methylthio-substituted acetylenes undergo smooth palladium-catalyzed cross-coupling reactions with functionalized aryl-, heteroaryl-, and alkylzinc reagents using the Pd(OAc)2/DPE-Phos catalytic system at 25 or 50 ˚C without the need for copper salts. alkynes - cross-coupling - organometallic reagents - palladium - zinc
<i>syn</i>-Selective Difunctionalization of Bicyclobutanes Enabled by Photoredox-Mediated C–S σ-Bond Scission
作者:Huamin Wang、Johannes E. Erchinger、Madina Lenz、Subhabrata Dutta、Constantin G. Daniliuc、Frank Glorius
DOI:10.1021/jacs.3c08512
日期:2023.11.1
regio- and syn-selectivity is disclosed. C–S σ-bond cleavage of partially unsaturated sulfur-containing bifunctional reagents in an overall strain-release-driven process enables the thio-alkynylation, -alkenylation, and -allylation of BCBs under mild conditions and demonstrates the generality of this protocol. Mechanisticstudies suggest that the intermediacy of cyclic distonic radical cations might be