Bromotrimethylsilane → HCID 60111226, compound

Participants

Reaction Steps

To a solution of 3-[1-(3,5-dimethyl-1H-pyrrol-2-yl)-meth-(Z)-ylidene]-2-oxo-2,3-dihydro-indole-1-carboxylic acid 3-(dimethoxy-phosphonooxy)-2-hydroxy-propyl ester (60 mg, 0.4 mmol) in 1.5 mL of acetonitrile and 1.5 mL of dichloromethane was added 52 μl (0.40 mmol) of TMSBr dropwise. The reaction mixture was stirred for 6 h at room temperature and concentrated. The residue was quenched with 0.05 mL of water followed by 1.5 mL of EtOAc. The resultant mixture was centrifuged and the solvent was decanted. The precipitate was washed twice with ethyl acetate and dried to afford 120 mg (62%) of 3-[1-(3,5-dim ethyl-1H-pyrrol-2-yl)-meth-(Z)-ylidene]-2-oxo-2,3-dihydro-indole-1-carboxylic acid 2-hydroxy-3-phosphonooxy-propyl ester as an orange solid. 1H NMR (400 MHz, DMSO-d6) δ 12.61 (s, 1H, NH-1′), 7.84 (dd, J=2.4, 8.0 Hz, 1H, H-4), 7.79 (dd, J=2.2, 6.8 Hz, 1H, H-7), 7.64 (s, 1H, H-vinyl), 7.16-7.21 (m, 2H, H-5, 6), 6.11 (s, br, 1H, H-4′), 4.40 (dd, J=4.0, 10.8 Hz, 1H), 4.32 (dd, J=5.8, 11.2 Hz, 1H), 4.00-4.05 (m, 1H), 3.90-3.93 (m, 2H), 2.37 (s, 3H, CH3), 2.33 (s, 3H, CH3). 31P NMR(162 MHz, d6-DMSO) δ 0.16.

Provenance & Evidence