Efficient Synthesis of Aryl Boronates via Zinc-Catalyzed Cross-Coupling of Alkoxy Diboron Reagents with Aryl Halides at Room Temperature
作者:Shubhankar Kumar Bose、Todd B. Marder
DOI:10.1021/ol502120q
日期:2014.9.5
A zinc(II)/NHC system catalyzes the borylation of aryl halides with diboron (4) reagents in the presence of KOMe at rt. This transformation can be applied to a broad range of substrates with high functional group compatibility. Radical scavenger experiments do not support a radical-mediated process.
Preparation of a large-sized highly flexible carbon nanohoop
作者:Yuta Nakagawa、Ryuta Sekiguchi、Jun Kawakami、Shunji Ito
DOI:10.1039/c9ob00763f
日期:——
The preparation of large-sized carbon nanohoops 1 and 2 was acheieved by Pt-mediated macrocyclization of the diborylated hexa-peri-hexabenzocoronene (HBC) derivative containing four mesityl substituents at the periphery. The temperature-dependent NMR measurements revealed the highly flexible nature of the carbon nanohoop 1. Structural features of 1 and 2 were examined by comparison of photophysical
Palladium nanoparticle catalysis: borylation of aryl and benzyl halides and one-pot biaryl synthesis via sequential borylation-Suzuki–Miyaura coupling
作者:Ansuman Bej、Dipankar Srimani、Amitabha Sarkar
DOI:10.1039/c2gc16111g
日期:——
catalyze the reaction of bis(pinacolato)diboron with various aryl/benzyl halides to afford aryl/benzyl boronates in high yield. Arylboronates thus prepared, have been directly used in the Suzuki–Miyaura coupling reaction with different aryl halides and benzyl halides in a convenient one-pot, two-step solvent free green synthesis of unsymmetrical biaryls and diarylmethanes.
Miyaura Borylations of Aryl Bromides in Water at Room Temperature
作者:Bruce H. Lipshutz、Ralph Moser、Karl R. Voigtritter
DOI:10.1002/ijch.201000045
日期:2010.12
New technology for palladium‐catalyzed cross‐couplings between B2pin2 and arylbromides leading to arylboronates is described. Micellar catalysis serves to enable borylations to take place in water as the only medium at ambient temperatures.
描述了钯催化 B 2 pin 2和芳基溴化物之间交叉偶联产生芳基硼酸酯的新技术。胶束催化作用是使硼酸化能够在环境温度下在作为唯一介质的水中发生。
Facile and economical Miyaura borylation and one-pot Suzuki–Miyaura cross-coupling reaction
作者:Phongsakorn Boontiem、Supavadee Kiatisevi
DOI:10.1016/j.ica.2020.119538
日期:2020.6
method for Miyaura borylationreaction between B2pin2 and aryl bromides is reported. The catalytic system containing 2 mol% PdCl2(PPh3)2 and KOAc serves to enable borylations to occur under solvent-free and atmospheric conditions. The developed protocol can be applied to synthesize symmetrical and unsymmetrical biaryls via one-pot two-step Suzuki–Miyaura cross-couplingreaction and also offers the