反应详情

Prepared using General Procedure 13: To a stirred solution of 4-(aminomethyl)phenol (2.0 g, 16.2 mmol) in DMF (10 mL) was added TEA (4.53 mL, 32.5 mmol) followed by tert-butyl 2-bromoacetate (2.40 mL, 16.2 mmol) added drop-wise over 30 minutes. After stirring a further 1 h at room temperature, the reaction mixture was diluted with EA (100 mL) and washed with water (2×100 mL). The organics were isolated and pre-absorbed onto silica gel then purified by silica gel chromatography (EA/isohexanes) to afford 1.86 g (48%) tert-butyl 2-((4-hydroxybenzyl)amino)acetate INT-22 as a white powder. LCMS-ESI (m/z) calculated for C13H19NO3: 237 found 236 [M−H]−, tR=1.20 min (Method 10). 1H NMR (400 MHz, DMSO) δ 9.24 (s, 1H), 7.12-7.05 (m, 2H), 6.73-6.66 (m, 2H), 3.55 (s, 2H), 3.12 (s, 2H), 2.15 (s, 1H) 1.41 (s, 9H).

1. customPrepared
2. additionadded drop-wise over 30 minutes
3. washwashed with water (2×100 mL)
4. customThe organics were isolated
5. custompre-absorbed onto silica gel
6. customthen purified by silica gel chromatography (EA/isohexanes)