Potassium Nitrate → HCID 86620263, compound

Participants

Reaction Steps

Ice cold H2SO4 (98%, 5 mL) was added to 218 (30 mg, 0.069 mmol) at 0° C. with stirring. An ice-cold solution of KNO3 (9 mg, 0.089 mmol) in H2SO4 (98%, 1 mL) was then added dropwise. After 1 h the mixture was poured into ice water and extracted with EtOAc (×3). The combined EtOAc extracts were washed with H2O, brine and dried. Chromatography eluting with petroleum ether/EtOAc (1:1) gave 1-(chloromethyl)-5,7-dinitro-3-(trifluoroacetyl)-1,2-dihydro-3H-benzo[e]indole-8-sulfonamide (219) (7 mg, 21%) as an orange powder: mp 201-204° C.; 1H NMR (CDCl3) δ 9.49 (s, 1H), 9.29 (s, 1H), 8.71 (s, 1H), 5.67 (s, 2H), 4.73 (d, J=10.8 Hz, 1H), 4.62 (dd, J=11.3, 8.8 Hz, 1H), 4.52-4.45 (m, 1H), 3.97 (dd, J=11.8, 3.5 Hz, 1H), 3.85 (dd, J=11.8, 6.3 Hz, 1H). HRMS (FAB) calcd. for C15H1135ClF3N4O7S (MH+) m/z 482.9989, found 482.9988.

Provenance & Evidence