Dialkyl arylphosphonates are prepared by the palladium-catalyzed reaction of aryl bromides with dialkyl phosphite in the presence of triethylamine. The similar treatment of vinyl bromides gives dialkyl vinylphosphonates stereoselectively.
Calix[4]quinone and other functionalized calixarenes were synthesized in high yields. The crystal structure of the calix[4]quinone was determined by the X-ray diffraction method.
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