arylation of tertiary phosphine ligands catalyzed by a ruthenium(II) complex was devised. This protocol gives access to a series of modified Buchwald–biaryl monophosphines on a gram scale in moderate to excellent yields. A catalytic cycle is proposed derived from knowledge of the intermediates observed by ESI-MS. Importantly, these monoarylated products could be further transformed into dibenzophosphole derivatives
Pd(II)-Catalyzed C(sp<sup>2</sup>)–H Hydroxylation with R<sub>2</sub>(O)P-Coordinating Group
作者:Hong-Yu Zhang、Hong-Ming Yi、Gang-Wei Wang、Bin Yang、Shang-Dong Yang
DOI:10.1021/ol403028a
日期:2013.12.20
A novel R-2(O)P-directed Pd(II)-catalyzed C-H hydroxylation to synthesize various substituted 2'-phosphorylbiphenyl-2-ol compounds is described. Notably, the reaction operates under mild conditions and shows good functional group tolerance, high selectivity, and yield.
Palladium-catalysed synthesis of biaryl phosphines
作者:Colin Baillie、Jianliang Xiao
DOI:10.1016/j.tet.2004.03.058
日期:2004.5
Monodentate, biphenyl-type phosphines have emerged as a powerful class of ligands in homogeneous catalysis. Synthetic methods for these ligands are limited, however. We report that the palladium-catalysed Suzuki coupling of OPR2(o-C6H4X) (R=Ph, t-Bu; X=Br, I) with arylboronic acids affords a variety of biaryl phosphine oxides including those that contain heterocycles. The corresponding phosphines are readily obtained by treatment with HSiCl3. The methodology provides an easy entry to monodentate biaryl and heterobiaryl P<^>X (X=N, O, S) phosphines with diverse steric and electronic properties. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis of biphenyl-based phosphines by Suzuki coupling
作者:Colin Baillie、Weiping Chen、Jianliang Xiao
DOI:10.1016/s0040-4039(01)01981-5
日期:2001.12
A series of phosphine oxides has been synthesised by the palladium-catalysed Suzuki coupling of arylboronic acids with OPPh2(o-C6H4Br). Oil reduction with trichlorosilane. functionalised. biphenyl-based phosphine ligands were obtained in good yields. Our preliminary results indicate these ligands to be effective for palladium-catalysed C-C coupling reactions including the formation of their own oxides. (C) 2001 Elsevier Science Ltd. All rights reserved.