Fe-promoted cross coupling of homobenzylic methyl ethers with Grignard reagents via sp3 C–O bond cleavage
作者:Shuang Luo、Da-Gang Yu、Ru-Yi Zhu、Xin Wang、Lei Wang、Zhang-Jie Shi
DOI:10.1039/c3cc43616k
日期:——
The first iron-catalyzed formal cross coupling of homobenzylic methyl ethers with alkyl Grignardreagents is realized. The reaction is proposed to proceed through a sequence of dehydroalkoxylation to form the vinyl-intermediate, followed by Fe-catalyzed selective carbometalation to form a benzylic Grignardreagent.
Diphenylacetylenes can be reduced to the corresponding diphenylethanes (2) in water in excellent yield using Al powder and Pd/C at 60 °C for 3 h in a sealed tube. In addition, the complete reduction of both aromatic rings required 80 °C for 15 h with Al powder in the presence of Pt/C. However, the nature of hydrogenated product formed was found to be strongly influenced by the reaction temperature
Hydroalkylation of styrenes enabled by boryl radical mediated halogen atom transfer
作者:Serena Pillitteri、Rajat Walia、Erik V. Van der Eycken、Upendra K. Sharma
DOI:10.1039/d4sc01731e
日期:——
present an inexpensive, stable, and easily available boryl radical source (BPh4Na) employed in a HalogenAtom Transfer (XAT) methodology. This mild and convenient strategy unlocks the use of not only alkyl iodides as radical precursors but also of the more challenging alkyl and aryl bromides to generate C-centered radicals. The generated radicals were further engaged in the anti-Markovnikov hydroalkylation