反応手順
A mixture of 119 (59.4 mg, 0.13 mmol), 5-[2-(dimethylamino)ethoxy]indole-2-carboxylic acid hydrochloride (48 mg, 0.17 mmol), EDCI (100 mg, 0.52 mmol), and TsOH (4.5 mg, 0.03 mmol) in DMA (2 mL) was stirred at room temperature for 4.5 h and then cooled to 0° C. Ice-cold aqueous NaHCO3 was added and the precipitate was filtered off, washed with water, and dried to give tert-butyl 2-{[1-(chloromethyl)-3-({5-[2-(dimethylamino)ethoxy]indol-2-yl}carbonyl)-5-nitro-1,2-dihydro-3H-benzo[e]indol-7-yl]sulfonyl}hydrazinecarboxylate (120) (84 mg, 94%) as a yellow solid: mp 175-180° C. (dec.); 1H NMR [(CD3)2SO] δ 11.72 (d, J=1.8 Hz, 1H), 9.85 (br s, 1H), 9.30 (v br s, 1H), 9.29 (s, 1H), 8.83 (d, J=1.5 Hz, 1H), 8.44 (d, J=8.9 Hz, 1H), 7.98 (dd, J=8.9, 1.7 Hz, 1H, 7.42 (d, J=8.9 Hz, 1H), 7.21 (d, J=1.6 Hz, 1H), 7.18 (d, J=2.4H, 1H), 6.95 (dd, J=8.9, 2.4 Hz, 1H), 5.02-4.96 (1,1H), 4.72 (dd, J=10.9, 2.4 Hz, 1H), 4.70-4.64 (m, 1H), 4.17-4.09 (m, 2H), 4.07 (t, J=5.9 Hz, 2H), 2.66 (t, J=5.7 Hz, 2H), 2.25 (s, 6H), 1.10 (br s, 9H). HRMS (FAB) calcd. for C3H3635ClN6O8S (MH+) m/z 687.2004, found 687.2002.
