I. Materials. All compounds were purchased from Aldrich, Alfa Aesar, TCI America, Matrix Scientific, Strem, and/or Fisher. NMR solvents were purchased from Cambridge Isotope Laboratories, Inc. Chlorobenzene (Acros) was used as-received. The flash chromatography of all compounds was performed utilizing silica gel 60 (32-63 micron) purchased from Bodman Industries. II. Instrumentation. Nuclear magnetic resonance (NMR) spectra were obtained using either a Bruker AvanceIII-500 or Bruker 300 NMR spectrometer. Chemical shifts for protons are reported in parts per million downfield from tetramethylsilane and are referenced to residual protium in the NMR solvent (CHCl 3 : δ 7.26). Chemical shifts for carbon are reported in parts per million downfield from tetramethylsilane and were referenced to the carbon resonances of the solvent (CDCl 3 : δ 77.2). Data are represented as follows: chemical shift, integration, multiplicity (s = singlet, d = doublet, sep = septet, m = multiplet, br = broad), coupling constants in Hertz (Hz), and assignment. Mass spectrometric data were obtained at the Caltech Mass Spectrometry Facility. A Biotage ® Initiator microwave reactor was used for all microwave experiments.Microwave reactions were conducted in septum-sealed, glass vials equipped with magnetic stirbars; an external surface sensor was used to monitor reaction conditions.
Efficient Microwave Method for the Oxidative Coupling of Phenols. -An efficient protocol for the oxidative coupling of phenols and naphthols is developed and compared with other oxidative coupling methodologies. -(GRANT-OVERTON, S.; BUSS, J. A.; SMITH, E. H.; GUTIERREZ, E. G.; MOORHEAD, E. J.; LIN, V. S.; WENZEL*, A. G.; Synth. Commun. 45 (2015) 3, 331-337, http://dx.
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