Novel Methodology for the Efficient Synthesis of 3-Aryloxindoles: [1,2]-Phospha-Brook Rearrangement–Palladium-Catalyzed Cross-Coupling Sequence
作者:Masahiro Terada、Azusa Kondoh、Akira Takei
DOI:10.1055/s-0035-1561859
日期:——
A novelmethodology for the efficient synthesis of 3-aryloxindoles from isatin derivatives was developed. The methodology involves the formation of an oxindole having a phosphate moiety at the C-3 position via the [1,2]-phospha-Brook rearrangement under Bronsted base catalysis followed by palladium-catalyzed cross-coupling with aryl boron reagents. The one-pot synthesis of 3-aryloxindoles from isatin
Et-duphos-nickel-catalyzed asymmetric arylation of benzaldehyde derivatives bearing an ortho-Me2PhSi group with potassium aryltriolborates
作者:Fumie Sakurai、Kazuhiro Kondo、Toyohiko Aoyama
DOI:10.1016/j.tetlet.2009.08.019
日期:2009.11
The Ni-catalyzed asymmetric arylation of benzaldehydes bearing an ortho-masked H group with potassium aryltriolborates has been developed. The keys to success were (i) steric tuning of benzaldehyde derivatives with an ortho-Me2PhSi group, and (ii) the use of potassium aryltriolborates as aryl sources. (C) 2009 Elsevier Ltd. All rights reserved.
Cyclic Triolborates: Air- and Water-Stable Ate Complexes of Organoboronic Acids
Synthesis, Palladium(II) Complexes, and Catalytic Use of a Phosphanylferrocene Ligand Bearing a Guanidinium Pendant
作者:Ondřej Bárta、Ivana Císařová、Petr Štěpnička
DOI:10.1002/ejic.201601262
日期:2017.1.10
and air-stable solvated complex 3·Me2CO and the in situ generated Pd(OAc)2/1·HCl system were found to be active catalysts for the Suzuki–Miyaura cross-coupling of anionic triolborates with aryl bromides, giving the corresponding biphenyls. These reactions, which do not require the presence of an additional base, were advantageously performed in aqueous ethanol, and the coupling products were isolated