615-54-3Relevant articles and documents
Direct C–H Carboxylation Forming Polyfunctionalized Aromatic Carboxylic Acids by Combined Br?nsted Bases
Hanasaka, Kazuya,Izumi, Koki,Kondo, Yoshinori,Kwon, Eunsang,Nozawa-Kumada, Kanako,Shigeno, Masanori,Tohara, Itsuki,Yamakoshi, Hiroyuki
supporting information, p. 809 - 814 (2022/02/05)
CO2 fixation into electron-deficient aromatic C–H bonds proceeds with the combined Br?nsted bases LiO-t-Bu and LiO-t-Am/CsF/18-crown-6 (t-Am = CEtMe2) under a CO2 atmosphere to afford a variety of polyfunctionalized aromat
Bromination of aromatic compounds using an Fe2O 3/zeolite catalyst
Nishina, Yuta,Takami, Keishi
supporting information, p. 2380 - 2383 (2013/02/21)
The catalytic bromination of non-activated aromatic compounds has been achieved using an Fe2O3/zeolite catalyst system. FeBr 3 was identified as the catalytic species, formed in situ from HBr and Fe2O3. The catalyst was easy-to-handle and cost effective and could also be recycled. The reaction system was also amenable to the one-pot sequential bromination/C-C bond formation of benzene.
Two flavors of PEPPSI-IPr: Activation and diffusion control in a single NHC-ligated Pd catalyst?
Larrosa, Igor,Somoza, Clara,Banquy, Alexandre,Goldup, Stephen M.
supporting information; experimental part, p. 146 - 149 (2011/03/20)
Abnormal reactivity has been observed in Negishi, Suzuki-Miyaura, and Kumada-Tamao-Corriu cross-couplings in which PEPPSI-IPr (where PEPPSI stands for pyridine enhanced precatalyst preparation, stabilization, and initiation and IPr refers to the NHC ligand) is employed, implicating the presence of two distinct Pd0 species in the catalytic cycle. Polybrominated arenes and organometallic reagents react selectively to give the product of exhaustive polysubstitution regardless of the initial reaction stoichiometry. Competition experiments suggest that, after an initial activation controlled oxidative addition, reductive elimination produces an ultrareactive Pd0 species which consumes all remaining C-Br bonds in the molecule under diffusion control.