A shortcut to tris[2-(4-hydroxyphenyl)ethyl]phosphine oxide and 2-(4-hydroxyphenyl)ethylphosphinic acid via reaction of elemental phosphorus with 4-tert-butoxystyrene
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Add time:08/17/2019 Source:sciencedirect.com
Red phosphorus reacts with 4-tert-butoxystyrene in KOH/DMSO system to afford (depending on the reaction conditions) tris(4-tert-but- oxyphenylethyl)phosphine oxide (48% yield) and/or 4-tert-butoxyphenylethylphosphinic acid (30% yield). The treatment of these products with aqueous HCl (45 °C, 5 min) quantitatively delivers tris[2-(4-hydroxyphenyl)ethyl]phosphine oxide and 2-(4-hydroxyphenyl)ethyl-phosphinic acid.
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