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。
Revealing Silylation of C(sp
<sup>2</sup>
)/C(sp
<sup>3</sup>
)–H Bonds in Arylphosphines by Ruthenium Catalysis
作者:Jian Wen、Ben Dong、Jinjun Zhu、Yue Zhao、Zhuangzhi Shi
DOI:10.1002/anie.202003865
日期:2020.6.26
The first aromatic C−H silylation between arylphosphines and hydrosilanes enabled by a ruthenium complex has been developed. The excellent ortho ‐selectivity results from a four‐membered metallacyclic intermediate involving phosphorus chelation. The developed system can be extended to the benzylic C−H silylation of arylphosphines. Diverse silylated arylphosphines are produced, exhibiting broad functional
Novel catalytic reductions of tertiary and secondaryphosphineoxides to phosphines have been developed. Using tetramethyldisiloxane (TMDS) as a mild reducing agent in the presence of copper complexes, PO bonds are selectively reduced in the presence of other reducible functional groups (FGs) such as ketones, esters, and olefins. Based on this transformation, an efficient one pot reduction/phosphination