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
摘要:
Red phosphorus reacts with 4-tert-butoxystyrene in KOH/DMSO system to afford (depending on the reaction conditions) tris(4-tert-butoxyphenylethyl)phosphine oxide (48% yield) and/or 4-tert-butoxyphenylethylphosphinic acid (30% yield). The treatment of these products with aqueous HCl (45 degrees C, 5 min) quantitatively delivers tris[2-(4-hydroxyphenypethyl]phosphine oxide and 2-(4-hydroxyphenyl)ethyl-phosphinic acid.
Four-Component Reaction between Secondary Phosphines, Primary Amines, Aldehydes, and Chalcogens: A Facile Access to Functionalized α-Aminophosphine Chalcogenides
original four-component reactionbetweensecondary phosphines, primary amines, aldehydes, and elemental sulfur or selenium occurs chemoselectively under mild conditions (60 °C, benzene, 3–9 h) to afford the hitherto unknown functionalized α-aminophosphine sulfides and selenides in good to excellent yields. The original four-component reactionbetweensecondary phosphines, primary amines, aldehydes, and elemental