Synthesis of air-stable zwitterionic 2-phosphiniminium-arenesulfonates
摘要:
Efficient synthetic methodology for preparation of 2-phosphiniminium-5-methylbenzenesulfonate zwitterions is reported. Staudinger reaction between phosphines and n-propyl 2-azido-5-methylbenzenesulfonates followed by sulfonate ester deprotection using pyridinium tetrafluoroborate/pyridine afforded the zwitterions in excellent yields. This new route directly accesses ortho-substituted-arenesulfonate ligands that incorporate a phosphinimine, a strong sigma-donor. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of air-stable zwitterionic 2-phosphiniminium-arenesulfonates
作者:Christopher T. Burns、Suisheng Shang、Rajesh Thapa、Mark S. Mashuta
DOI:10.1016/j.tetlet.2012.06.112
日期:2012.9
Efficient synthetic methodology for preparation of 2-phosphiniminium-5-methylbenzenesulfonate zwitterions is reported. Staudinger reaction between phosphines and n-propyl 2-azido-5-methylbenzenesulfonates followed by sulfonate ester deprotection using pyridinium tetrafluoroborate/pyridine afforded the zwitterions in excellent yields. This new route directly accesses ortho-substituted-arenesulfonate ligands that incorporate a phosphinimine, a strong sigma-donor. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and Reactivity of Neutral Palladium(II) Alkyl Complexes that Contain Phosphinimine-Arenesulfonate Ligands
作者:Christopher T. Burns、Suisheng Shang、Mark S. Mashuta
DOI:10.1021/om501262r
日期:2015.5.26
The synthesis and characterization of ortho-phosphiniminium-arenesulfonate zwitterions 1a–1d, the corresponding sodium salts 3a–3d, methyl(pyridine)palladium(II) complex 4a, and methyl(4-tert-butylpyridine)palladium(II) 5a–5d complexes are reported. Complex 4a suffers from limited solubility in aromatic hydrocarbons, while 5a–5d are soluble in benzene and toluene. Complex 5a forms a tridentate orthopalladated