P-(2-羟基苯基)-膦酸二乙酯

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a cooled (0° C.) mixture of (2-hydroxy-phenyl)-phosphonic acid diethyl ester (13.1 g, 56.9 mmol) and sodium iodide (10.2 g, 68.3 mmol) in DMF (200 mL) was added chloramine-T trihydrate (19.2 g, 68.3 mmol) over 5 min. After 10 min, the reaction was allowed to warm to rt and the mixture was allowed to stir at rt for 2 h. The mixture was diluted with H2O (50 mL), acidified using 0.5 N HCl and extracted twice with EtOAc. The organic extracts were pooled and washed sequentially with satd. Na2S2O3/brine (1/1) and then brine. The organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure. The residue was chromatographed over silica gel (elution with a stepwise gradient 5-15% EtOAc-hexanes) to give 14.9 g (73%) of a colorless solid after recrystallization (EtOAc-hexanes). Rf 0.30 (20% EtOAc-hexanes). Electrospray Mass Spectrum (50/50 acetonitrile/water) m/z 357 (M+H). To a cooled extracted twice with EtOAc washed sequentially with satd The organic layer was dried over anhydrous Na2SO4 concentrated under reduced pressure The residue was chromatographed over silica gel ( elution with a stepwise gradient 5-15% EtOAc-hexanes)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a cooled (0° C.) mixture of (2-hydroxy-phenyl)-phosphonic acid diethyl ester (13.1 g, 56.9 mmol) and sodium iodide (10.2 g, 68.3 mmol) in DMF (200 mL) was added chloramine-T trihydrate (19.2 g, 68.3 mmol) over 5 min. After 10 min, the reaction was allowed to warm to rt and the mixture was allowed to stir at rt for 2 h. The mixture was diluted with H2O (50 mL), acidified using 0.5 N HCl and extracted twice with EtOAc. The organic extracts were pooled and washed sequentially with satd. Na2S2O3/brine (1/1) and then brine. The organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure. The residue was chromatographed over silica gel (elution with a stepwise gradient 5-15% EtOAc-hexanes) to give 14.9 g (73%) of a colorless solid after recrystallization (EtOAc-hexanes). Rf 0.30 (20% EtOAc-hexanes). Electrospray Mass Spectrum (50/50 acetonitrile/water) m/z 357 (M+H). To a cooled extracted twice with EtOAc washed sequentially with satd The organic layer was dried over anhydrous Na2SO4 concentrated under reduced pressure The residue was chromatographed over silica gel ( elution with a stepwise gradient 5-15% EtOAc-hexanes)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a cooled (0° C.) mixture of (2-hydroxy-phenyl)-phosphonic acid diethyl ester (13.1 g, 56.9 mmol) and sodium iodide (10.2 g, 68.3 mmol) in DMF (200 mL) was added chloramine-T trihydrate (19.2 g, 68.3 mmol) over 5 min. After 10 min, the reaction was allowed to warm to rt and the mixture was allowed to stir at rt for 2 h. The mixture was diluted with H2O (50 mL), acidified using 0.5 N HCl and extracted twice with EtOAc. The organic extracts were pooled and washed sequentially with satd. Na2S2O3/brine (1/1) and then brine. The organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure. The residue was chromatographed over silica gel (elution with a stepwise gradient 5-15% EtOAc-hexanes) to give 14.9 g (73%) of a colorless solid after recrystallization (EtOAc-hexanes). Rf 0.30 (20% EtOAc-hexanes). Electrospray Mass Spectrum (50/50 acetonitrile/water) m/z 357 (M+H). To a cooled extracted twice with EtOAc washed sequentially with satd The organic layer was dried over anhydrous Na2SO4 concentrated under reduced pressure The residue was chromatographed over silica gel ( elution with a stepwise gradient 5-15% EtOAc-hexanes)

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a cooled (0° C.) mixture of (2-hydroxy-phenyl)-phosphonic acid diethyl ester (13.1 g, 56.9 mmol) and sodium iodide (10.2 g, 68.3 mmol) in DMF (200 mL) was added chloramine-T trihydrate (19.2 g, 68.3 mmol) over 5 min. After 10 min, the reaction was allowed to warm to rt and the mixture was allowed to stir at rt for 2 h. The mixture was diluted with H2O (50 mL), acidified using 0.5 N HCl and extracted twice with EtOAc. The organic extracts were pooled and washed sequentially with satd. Na2S2O3/brine (1/1) and then brine. The organic layer was dried over anhydrous Na2SO4 and concentrated under reduced pressure. The residue was chromatographed over silica gel (elution with a stepwise gradient 5-15% EtOAc-hexanes) to give 14.9 g (73%) of a colorless solid after recrystallization (EtOAc-hexanes). Rf 0.30 (20% EtOAc-hexanes). Electrospray Mass Spectrum (50/50 acetonitrile/water) m/z 357 (M+H). To a cooled extracted twice with EtOAc washed sequentially with satd The organic layer was dried over anhydrous Na2SO4 concentrated under reduced pressure The residue was chromatographed over silica gel ( elution with a stepwise gradient 5-15% EtOAc-hexanes)