Intramolecular<i>anti</i>-Phosphinoauration of Alkynes: An FLP-Motivated Approach to Stable Aurated Phosphindolium Complexes
作者:Sebastian Arndt、Max M. Hansmann、Petr Motloch、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/chem.201605914
日期:2017.2.21
elevated temperatures induced the cyclization to give stable aurated phosphindolium salts, which is supported by DFT calculations. The key elementary step that comprises a yet unknown anti‐phosphinoauration of an unactivated alkyne is favored if bulky NHC ligands are used which was analyzed by kinetic measurements. This concept could furthermore be extended to neutral (phosphindolium)AuCl complexes featuring
Phospholyl(borane) Amino Acids and Peptides: Stereoselective Synthesis and Fluorescent Properties with Large Stokes Shift
作者:Mathieu Arribat、Emmanuelle Rémond、Sébastien Clément、Arie Van Der Lee、Florine Cavelier
DOI:10.1021/jacs.7b10954
日期:2018.1.24
The synthesis of phospholyl(borane) amino acids was stereoselectively achieved by reaction of phospholide anion with iodo α-amino ester derived from l-aspartic acid or l-serine, followed by in situ complexation with borane. Phospholyl(borane) amino acids are easy to store and can be subjected to direct transformation into the corresponding free phospholyl, gold complex, oxide or sulfur derivatives as
Abstract A divergent intramolecular reaction of phosphine tethered alkyne in protic solvent was developed. This provided a novel and simple access to a large variety of (Z)-alkenylphosphine oxides and phospholane oxides. Our preliminary studies suggested that these divergent reactions are closely related to the reaction condition and molecular structure. A possible mechanism of C-P bond cleavage of
Direct Access to π‐Extended Phosphindolium Salts by Simple Proton‐Induced Cyclization of (
<i>o</i>
‐Alkynylphenyl)phosphanes
作者:Sebastian Arndt、Max M. Hansmann、Frank Rominger、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/chem.201700889
日期:2017.4.24
synthetic and mechanistic study for the synthesis of phosphindolium salts from easy accessible (o‐alkynylphenyl)phosphanes is reported. Mechanistic investigation indicates a fast protonation at phosphorus as evidenced by the isolation of the phosphonium intermediate, followed by a protophosphonylation reaction across the alkyne moiety. DFT calculations support our mechanistic proposal and indicate a
Synthesis of the Sterically Shielded Rhodium(I) Arene Complex by Cycloaddition of the Phosphorous‐Substituted Alkyne
作者:Roman A. Pototskiy、Mikhail A. Boym、Yulia V. Nelyubina、Dmitry S. Perekalin
DOI:10.1002/zaac.202200231
日期:2022.9.27
Reaction of two molecules of o-diphenylphosphino-tolane with RhCl(PPh3)3 produces the metallacycle complex with C4Rh(P3)Cl core. Further addition of tolane leads to 2+2+2-cycloaddition and gives the cationic complex [Rh(Ph2P−C6H4−C6Ph4−C6H4−PPh2)]Cl, in which the metal is coordinated to C6Ph4 aromatic ring as well to two chelating PPh2 groups. The resulting bulky terphenyl-diphosphine ligand with phosphorous