Sequential Protocol for C(sp3)–H Carboxylation with CO2: Transition-Metal-Catalyzed Benzylic C–H Silylation and Fluoride-Mediated Carboxylation
摘要:
One of the most challenging transformations in current organic chemistry is the catalytic carboxylation of a C(sp(3))-H bond using CO2 gas, an inexpensive and ubiquitous Cl source. A sequential protocol for C(sp(3))-H carboxylation by employing a nitrogen-directed, metal-assisted, C-H activation/catalytic silylation reaction in conjunction with fluoride-mediated carboxylation with CO2 was established. The carboxylation proceeded only at the benzylic C(sp(3))-Si bond, not at the aromatic C(sp(2))-Si, which is advantageous for further manipulations of the products.
LUMINESCENT DIAZABENZIMIDAZOLE CARBENE METAL COMPLEXES
申请人:BASF SE
公开号:US20160181549A1
公开(公告)日:2016-06-23
The present invention relates to metal-carbene complexes of the general formula (I), where variable M is Ir or Pt and that are characterized by variable R being a group of formula (a). The complexes are used in organic electronic devices, especially OLEDs (Organic Light-Emitting Diodes), illuminating elements, stationary visual display units and in material layers as emitter, charge transport material and/or charge or exiton blocker.
[EN] LUMINESCENT DIAZABENZIMIDAZOLE CARBENE METAL COMPLEXES<br/>[FR] COMPLEXES DIAZABENZIMIDAZOLE CARBÈNE-MÉTAL LUMINESCENTS
申请人:BASF SE
公开号:WO2015014835A1
公开(公告)日:2015-02-05
The present invention relates to metal-carbene complexes of the general formula (I), where variable M is Ir or Pt and that are characterized by variable R being a group of formula (a). The complexes are used in organic electronic devices, especially OLEDs (Organic Light-Emitting Diodes), illuminating elements, stationary visual display units and in material layers as emitter, charge transport material and/or charge or exiton blocker.
Sequential Protocol for C(sp<sup>3</sup>)–H Carboxylation with CO<sub>2</sub>: Transition-Metal-Catalyzed Benzylic C–H Silylation and Fluoride-Mediated Carboxylation
作者:Tsuyoshi Mita、Kenichi Michigami、Yoshihiro Sato
DOI:10.1021/ol301431d
日期:2012.7.6
One of the most challenging transformations in current organic chemistry is the catalytic carboxylation of a C(sp(3))-H bond using CO2 gas, an inexpensive and ubiquitous Cl source. A sequential protocol for C(sp(3))-H carboxylation by employing a nitrogen-directed, metal-assisted, C-H activation/catalytic silylation reaction in conjunction with fluoride-mediated carboxylation with CO2 was established. The carboxylation proceeded only at the benzylic C(sp(3))-Si bond, not at the aromatic C(sp(2))-Si, which is advantageous for further manipulations of the products.