Synthesis and Solid-State Structure of Substituted Arylphosphine Oxides
摘要:
We describe the preparation and characterization of several new arylphosphine oxides, which are of interest as second-order nonlinear optical materials, (4-Aminophenyl)diphenylphosphine oxide (la), bis(4-aminophenyl)phenylphosphine oxide (2a), and (4-aminophenyl)bis[4'-(trifluoromethyl)phenyl]phosphine oxide (5) were prepared by addition of aryl Grignard and organolithium reagents containing protected amines to phosphorus oxyhalides. Alternatively, 1a was prepared by treatment of (4-bromophenyl)diphenylphosphine oxide with azidomethyl phenyl sulfide, followed by hydrolysis. (4-Aminophenyl)(4'-nitrophenyl)phenylphosphine oxide (6) was prepared by nucleophilic aromatic substitution of bis(4-fluorophenyl)phenylphosphine oxide to give the corresponding dinitro compound, followed by selective mono-reduction. The X-ray crystal structure of (4-aminophenyl)diphenylphosphine oxide (1a), along with those of mono-, di-, and trihydroxy triphenylphosphine oxides 1b, 2b, and 3b, exhibit extensive intermolecular hydrogen bonding. The hydrogen bonding in 1a and 1b produces chains of arylphosphine oxide molecules with a head-to-tail alignment; the chains pack in an antiparallel manner to produce solid-state structures that display only slight deviations from centrosymmetry.
A practical synthesis of unsymmetrical triarylphosphines by heterogeneous palladium(0)-catalyzed cross-coupling of aryl iodides with diphenylphosphine
作者:Zhaotao Xu、Pingping Wang、Qiurong Chen、Mingzhong Cai
DOI:10.1016/j.jorganchem.2018.04.018
日期:2018.7
The heterogeneous cross-coupling reaction of aryl iodides with diphenylphosphine was achieved in DMAc at 130 °C in the presence of 1.0 mol% of MCM-41-supported tridentate nitrogen palladium(0) complex [MCM-41-3N-Pd(0)] with KOAc as base, yielding a variety of unsymmetrical triarylphosphines in good to excellent yields. The turnover frequency (TOF) of the catalyst can reach 30.67 h−1. This new heterogeneous
An efficient heterogeneous cross-coupling of aryl iodides with diphenylphosphine catalyzed by copper (I) immobilized in MCM-41
作者:Zhiqiang Fang、Mingzhong Cai、Yang Lin、Hong Zhao
DOI:10.1002/aoc.4417
日期:2018.8
The heterogeneous cross‐coupling reaction of aryl iodides with diphenylphosphine was achieved in toluene at 115 °C in the presence of 10 mol% of phenanthroline‐functionalized MCM‐41‐supported copper (I) complex (Phen‐MCM‐41‐CuI) with Cs2CO3 as base, yielding various unsymmetric triarylphosphines in good to excellent yields. This protocol can tolerate a wide range of functional groups and does not need
在10 mol%的邻菲咯啉官能化的MCM-41-负载的铜(I)络合物(Phen-MCM-41-CuI)和10 mol%的存在下,芳基碘化物与二苯膦的异质交叉偶联反应在115°C的甲苯中完成以Cs 2 CO 3为碱,以良好或优异的产率产生各种不对称的三芳基膦。该方案可以耐受各种官能团,不需要使用昂贵的添加剂或苛刻的反应条件。这种非均相的Cu(I)催化剂具有与均相CuI / Phen系统相同的催化活性,可以通过简单过滤反应溶液轻松回收,并循环使用七次而不会显着降低活性。
Effect of triarylphosphane ligands on the rhodium-catalyzed hydrosilylation of alkene
作者:Mei Xue、Jiayun Li、Jiajian Peng、Ying Bai、Guodong Zhang、Wenjun Xiao、Guoqiao Lai
DOI:10.1002/aoc.3092
日期:2014.2
functionalized triarylphosphaneligands are characterized by a very high catalytic effectiveness for the hydrosilylation of alkene. Among these catalysts tested, RhCl3/diphenyl(2‐(trimethylsilyl)phenyl)phosphane (8a) exhibited excellent catalytic properties. Using this silicon‐containing phosphane ligand for the rhodium‐catalyzed hydrosilylation of styrene, both higher conversion of alkene and higher β‐adduct
A series of chiral bisphosphine ligands were designed and synthesized based on single-handed quinoline oligoamidefoldamers. The bisphosphine ligands can coordinate with Rh(cod)2BF4 in a 1 : 1 stoichiometry and the resulted chiral Rh(I) catalysts were applied in the asymmetric hydrogenation of α-dehydroamino acid esters, in which excellent conversions and promising levels of enantioselectivity were
SULFONE HYBRID PRECURSOR, METHOD OF SYNTHESIZING SAME, AND USES THEREOF
申请人:Barboiu Mihail-Dumitru
公开号:US20110190526A1
公开(公告)日:2011-08-04
The present invention relates to a novel sulfone hybrid precursor, to the synthesis method thereof, and to the uses thereof, particularly for preparing proton-exchanging electrolyte membranes as the functional hybrid charge in a host structure; for the manufacture of functional hybrid nanoparticles by sol-gel polymerization; for the use as a fluidifying agent; for the production of surface coverings through chemical grafting by means of sol-gel polymerization; for the use as a hygroscopic agent; and for the use as a bonding or structuring agent.