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Palladium(0)-catalyzed amination of allylic natural terpenic functionalized olefins

100%

Houssame S. , Anane H. , Firdoussi L. , Karim A.

Open Chemistry

2008

tom 6

nr 3

470-476

The palladium(0) catalyzed amination of allylic acetates and carbonates derivatives from terpenic olefins was carried out under mild conditions. The reaction offers a very good method for the preparation of allylic amines and thus to provide a useful entry to new functionalized terpenic olefin products. The mechanism involving a formation of p-allyl-palladium intermediate complex is in good agreement with the results obtained with the optically active substrates, as well as via an analysis of the observed regio-and stereoselectivity. [...]

PXPd-catalyzed borylation of aniline derivatives

88%

Wheaton S. , Humanayun Kabir S. , Zhang H. , Vogels C. , Decken A. , Westcott S.

Open Chemistry

2010

tom 8

nr 4

725-731

Addition of pinacolborane (HBO2C2Me4) to 2-iodoaniline can be catalyzed using a number of palladium complexes, including [(t-Bu)2PCl]2PdCl2 (PXPd), to give the corresponding boronate ester 2-H2NC6H4(BO2C2Me4) in excellent yields. The PXPd system could also be used in the catalyzed borylation of substituted anilines to give the corresponding aminoboronate esters in moderate to high yields. [...]

Application of poly (N-phenylethanolamine) modified MWCNTs as a new sorbent for solid-phase extraction of trace palladium ions in soil and water samples

75%

Behbahani M. , Bagheri A. , Gorji T. , Nabid M. R. , Sedghi R. , Oskooie H. A. , Heravi M. M.

Sample Preparation

2013

tom 1

10-17

This paper describes, a new, sensitive, and low cost solid-phase extraction (SPE) method using a poly(N-phenylethanolamine) /multi-walled carbon nanotubes (MWCNTs) nanocomposite for extraction, pre-concentration, and flame atomic absorption spectrometric (FAAS) determination of trace level palladium in distilled water, tap water, Caspian sea water, Persian Gulf water, spring water, lake water and soil samples, as well as real samples. The poly(N-phenylethanolamine)/MWCNTs nanocomposite were characterized using Fourier Transform-infrared (FT-IR) spectroscopy, thermo-gravimetric analysis (TGA) and scanning electron microscopy (SEM). Factors affecting the pre-concentration of palladium, including sample pH, flow rate, and type and volume of eluent, were investigated. The effect of interfering ions and break through volume on the separation and determination of palladium ions was also determined. The maximum sorbent capacity of the poly (N-phenylethanolamine)/MWCNTs nanocomposite was calculated to be 101.5 mg g−1. The pre-concentration factor, relative standard deviation, and limit of detection of the method were found to be 150, 2.8% (n=10), and 0.09 ng mL−1, respectively. The presented method was compared to certified reference materials, and finally, the presented technique was applied to different matrices spiked with 5 ng mL−1 of analyte.

Generation of Molecular Shape Diverstiy. From Privileged Scaffolds to Diverted Total Synthesis

63%

Dai W.-M.

Diversity Oriented Synthesis

2012

tom 1

nr 1

Molecular shape is a presentation of a molecule’s three-dimensional structure and its volume of space and surface electrostatic potential map collectively define the function, e. g. as a modulator or probe to biological targets. Molecular shape diversity for compound libraries with multiple scaffolds (rich skeletal diversity) is recognized as a prerequisite for discovering broad bioactivity. Established strategies and methodologies for diversity-oriented synthesis (DOS) are useful for generating molecular shape diversity by synthesizing natural product-like compounds. On the other hand, diverted total synthesis (DTS) offers natural products and analogues with a higher degree of structural diversity and complexity. Examples of DOS of privileged heterocycles and DTS of amphidinolide T marine macrolides from the author’s laboratories are illustrated.