Reaktionsschritte
To a solution of N,N-bis(2-chloroethyl)benzene-1,4-diamine hydrochloride (18, 0.306 g, 1.0 mmol) in dry CHCl3 (35 mL) containing Et3N (0.2 mL) was added dropwise a solution of triphosgene (115 mg, 0.4 mmol.) in an ice bath with vigorous stirring for 30 min. The reaction mixture was evaporated and the residue diluted with THF (20 mL), filtered through a pad of Celite, washed with THF (5 mL). The filtrate and washings were combined and was added dropwise into a solution of 3-(acridin-9-yl)amino-5-hydroxymethylaniline (6, AHMA)18 (0.351 g, 1.0 mmol) in dry DMF (10 mL) containing Et3N (0.5 mL) at 0° C. After being stirred for 18 h, the reaction mixture was evaporated in vacuo to dryness and the residue was dissolved in a mixture of CHCl3/MeOH, mixed with silica gel (5 gm) and evaporated in vacuo to dryness. The residue was put on the top of a silica gel column (2×20 cm) and chromatographed using CHCl3/MeOH (100:5 v/v) as eluent. The fractions containing the main product were combined and evaporated in vacuo to dryness and residue was recrystallized from CHCl3/MeOH to give 1-[3-(acridin-9-ylamino)-5-hydroxymethylphenyl]-3-{4-[bis(2-chloroethyl)amino]phenyl}urea (BO-1037), 205 mg (35%); mp 173-175° C.; 1H NMR (DMSO-d6) δ 3.67 (8H, m, 4×CH2), 4.41 (2H, d, J=6.0 Hz, CH2), 5.14 (1H, t, J=6.0 Hz, exchangeable, OH), 6.37 (1H, s, ArH), 6.68 (2H, d, J=9.1 Hz, 2×ArH,), 6.81 (1H, s, ArH), 7.01 (1H, s, ArH), 7.05-7.19 (1H, m, ArH), 7.24 (2H, d, J=9.1 Hz, 2×ArH), 7.55 (4H, m, 4×ArH) 8.05 (2H, m, 2×ArH), 8.25 (1H, m, ArH) 8.46 (1H, m, ArH), 10.48 (1H, brs, exchangeable, NH). Anal. Calcd. for (C31H29Cl2N5O2): C, 63.81; H, 5.18; N, 12.00. Found: C, 64.07; H, 5.26; N, 11.87.
