Potassium Iodide → Phosphoric Acid di-tert-butyl Ester 2,5-dioxo-4,4-diphenyl-imidazolidin-1-ylmethyl Ester

関与物質

反応条件

反応手順

35.5 Grams of 3-(chloromethyl)-5,5-diphenyl-2,4-imidazolidinedione from Step (A), 30.7 g of potassium di(t-butyl) phosphate, 0.6 g of potassium carbonate, and 0.15 g of potassium iodide were slurried into 200 mL acetonitrile. The reaction mixture was heated at reflux for 2.5 hours. The solution was filtered to remove potassium chloride precipitate. The filtrate was cooled to 0° C. and filtered to give 22.3 g of the title compound (38.6% yield); mp 108.5° C. (d). 1H NMR (DMSO-d6): 1.3 ppm (s, 18H), 5.2 (d, 2H), 7.3-7.5 (m, 10H), 9.9 (s, 1H); doublet from long range phosphorus coupling.

情報源と証拠