Iridium-Catalyzed, Diastereoselective Dehydrogenative Silylation of Terminal Alkenes with (TMSO)<sub>2</sub>MeSiH
作者:Chen Cheng、Eric M. Simmons、John F. Hartwig
DOI:10.1002/anie.201304084
日期:2013.8.19
achieved under mild conditions with low catalyst loading. The diastereoselectivity of the reaction can be controlled by choosing the appropriate ancillary ligand (see scheme; coe=cyclooctene). The silylation products undergo further transformation such as oxidation or cross‐coupling.
Copper-catalyzed decarboxylative C(sp2)–C(sp3) coupling reactions via radical mechanism
作者:Hailong Yang、Peng Sun、Yan Zhu、Hong Yan、Linhua Lu、Xiaoming Qu、Tingyi Li、Jincheng Mao
DOI:10.1039/c2cc33203e
日期:——
We have successfully developed an example of copper-catalyzed decarboxylative C(sp(2))-C(sp(3)) coupling reactions via C-H functionalization for the first time. It is noteworthy that our catalytic system is very stable, low-cost, palladium-free, ligand-free, and easily accessible.
C–C bond-forming reactions using Katritzky salts, their deaminative allylation remains a challenge. Inspired by the metallaphotoredox-catalyzed allylicsubstitution regime, here, we report the deaminative allylation of Katritzky salts via cobalt/organophotoredox dual catalysis. This cross-electrophile coupling enables regioselective allylation using a variety of allylic esters, overcoming the substrate
Direct Photoexcitation of Xanthate Anions for Deoxygenative Alkenylation of Alcohols
作者:Hong-Mei Guo、Bin-Qing He、Xuesong Wu
DOI:10.1021/acs.orglett.2c00889
日期:2022.5.6
In this report, we identify xanthate salts as a unique class of visible-light-excitable alkyl radical precursors that act simultaneously as strong photoreductants and alkyl radical sources. Upon direct photoexcitation of xanthate anions, efficient deoxygenative alkenylation and alkylation of a wide range of primary, secondary, and tertiary alcohols have been achieved via a one-pot protocol, avoiding
Carboncarbon bond formation on solid support. Application of the classical Julia–Lythgoe olefination
作者:Jo N.P. D'herde、Pierre J. De Clercq
DOI:10.1016/s0040-4039(03)01637-x
日期:2003.8
Reductive elimination of β-benzoyloxysulfones, obtained via solid-phase organic synthesis, with samariumdiiodide in the presence of DMPU favors the formation of trans-alkenes.