Journal of Organic Chemistry p. 4681 - 4685 (1983)
Update date:2022-08-31
Topics:
Smith, Curtis P.
Temme, George H.
Polystyrene-anchored triphenylarsine oxide 8 has been prepared from brominated polystyrene beads by a lithium-mediated arsenation-hydrogen peroxide oxidation sequence.Compound 8 with only 0.6 mequiv of As/g has been found to be a highly effective, insoluble catalyst for the conversion of aryl isocyanates to diarylcarbodiimides in high yield.Up to 5.6 x 104 turnovers of the catalyst 8 in the carbodiimide-forming reaction have been measured when appropriate measures are taken to prevent its deactivation.Several arylcarbodiimides have been prepared in high yield by using 8.
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