反应详情

To 5-chloro-2-methyl-4-nitrobenzoic acid (197 mg, 0.91 mmol) in DMF (5 mL) was added triethylamine (0.13 mL, 0.91 mmol) and HATU (345 mg, 0.91 mmol) followed by morpholine (0.08 mL, 0.91 mmol). The mixture was allowed to stir at RT for 18 h and then water (10 mL) and DCM were added. The organic phase was passed through a hydrophobic frit and the solvent was removed in vacuo. Purification of the residue via silica gel column chromatography (0-100% EtOAc in iso-hexane) gave (5-chloro-2-methyl-4-nitrophenyl)(morpholino)methanone (244 mg, 95%) as an off-white solid. LCMS (10 cm_ESCI_Bicarb_MeCN): [M+H]+=285 at 3.05 min. 1H NMR (400 MHz, CDCl3): δ 7.76 (s, 1H), 7.36 (s, 1H), 3.83-3.76 (m, 4H), 3.66-3.58 (m, 2H), 3.28-3.20 (m, 2H), 2.37 (s, 3H).

1. customthe solvent was removed in vacuo
2. customPurification of the residue via silica gel column chromatography (0-100% EtOAc in iso-hexane)