Evaluation of dicopper azacryptand complexes in aqueous CuAAC reactions and their tolerance toward biological thiols
作者:Thi V. Tran、Garret Couture、Loi H. Do
DOI:10.1039/c9dt00724e
日期:——
The catalytic activity of dicopper azacryptands was evaluated in water and in the presence of biological thiols.
二铜氮杂环戊烷的催化活性在水中和生物硫醇存在下进行了评估。
Selective Extraction and Transport of the [PtCl<sub>6</sub>]<sup>2−</sup>Anion through Outer-Sphere Coordination Chemistry
作者:Rebecca J. Warr、Arjan N. Westra、Katherine J. Bell、Jy Chartres、Ross Ellis、Christine Tong、Timothy G. Simmance、Anastasia Gadzhieva、Alexander J. Blake、Peter A. Tasker、Martin Schröder
DOI:10.1002/chem.200802377
日期:2009.5.4
recovery: Tripodal receptors incorporating urea, amido or sulfonamido hydrogen‐bond donors show high loading and selectivity for extraction of [PtCl6]2− over chloride (present in 60‐fold excess) from a low pH aqueous phase to organic media (see figure). The formation of neutral 2:1 [LH]+/[PtCl6]2− packages in organic solvents is supported by single‐crystal X‐ray structure determinations.
Highly Active Palladium Catalysts Supported by Bulky Proazaphosphatrane Ligands for Stille Cross-Coupling: Coupling of Aryl and Vinyl Chlorides, Room Temperature Coupling of Aryl Bromides, Coupling of Aryl Triflates, and Synthesis of Sterically Hindered Biaryls
作者:Weiping Su、Sameer Urgaonkar、Patrick A. McLaughlin、John G. Verkade
DOI:10.1021/ja0450096
日期:2004.12.1
R' = i-Bu, 1; R = Bz, R' = i-Bu, 3; R = R' = Bz, 4] for palladium-catalyzed Stille reactions of aryl chlorides is described. Catalysts derived from ligands 1 and 4 efficiently catalyze the coupling of electronically diverse aryl chlorides with an array of organotin reagents. The catalyst system based on the ligand 3 is active for the synthesis of sterically hindered biaryls (di-, tri-, and tetra-ortho
(tris-dtc-Me), (tris[2-(isopropylamino)ethyl]amine) (=tris-dtc-iPr) and (tris[2-(benzylamino)ethyl]amine) (=tris-dtc-Bn). Compounds 1–9 have been analyzed as far as possible by elemental analysis, FAB+ mass spectrometry, IR and NMR (1H, 13C, 119Sn) spectroscopy, and single-crystal X-ray diffraction analysis. The solid state and solution studies showed that the dtc ligands are coordinated to the tin atoms