反応手順
A solution of 9-bromo-3-methylbenzo[f]quinazolin-1(2H)-one (0.87 g, 3.0 mmol), 4-vinylbenzoic acid (0.87 g, 5.9 mmol), palladium acetate (0.45 g, 2.0 mmol), and tri (2-tolyl) phosphine (1.2 g, 3.9 mmol) in N-methylmorpholine (90 ml) was stirred under nitrogen at reflux for 1 hour. Additional palladium acetate (0.45 g, 2.0 mmol) and tri(2-tolyl)phosphine (1.2 g, 3.9 mmol) were added and the reaction mixture was refluxed for a further 4 hours. The resulting suspension was allowed to cool, the solid filtered and washed with diethyl ether. The solid was resuspended in a small volume of boiling ethanol, filtered hot, washed with diethyl ether and dried under vacuum at 80° C. to give 4-(2-(1,2-dihydro-3-methyl-1-oxobenzo[f]quinazolin-9-yl)vinyl)benzoic acid 1H NMR (DMSO-d6, 300 MHz) δ: 2.44 (s, 3H, CH3), 7.50 (d,J=16.5 Hz, 1H, vinyl CH), 7.61 (d, J=8 Hz, 1H, Ar), 7.65 (d, J=16 Hz, 1H, vinyl CH), 7.83 (d, J=8 Hz, 2H, Ar), 7.96 (d, J=8 Hz, 2H, Ar), 8.05 (s, 2H, Ar), 8.23 (d, J=9 Hz, 1H, Ar), 9.96 (s, 1H, Ar), 12-13.2 (v br s, 1H, CO2), 12.6 (br s, 1H, N2H) containing 6.7% by NMR of 9-bromo-3-methylbenzo[f]quinazolin-1-(2H)-one (0.80 g). To a suspension of the acid in a solution of L-glutamic acid diethyl ester hydrochloride (0.72 g, 3.0 mmol) and triethylamine (0.42 ml, 3.0 mnol) in dimethylformamide (50 ml) was added 1-(3-dimethylaminopropyl)3-ethylcarbodiimide hydrochloride (0.48 g, 2.5 umol). After stirring the mixture for 4 hours, more dimethylformamide (50 ml) was added and the suspension stirred overnight. The reaction mixture was heated to 65° C., 1-(3-dimethylaminopropyl)3-ethylcarbodiimide hydrochloride (0.32 g, 1.7 mmol) was added and the suspension was stirred for 6 hours to give a homogeneous solution. The solution was stirred for 60 hours at room temperature, then concentrated in vacuo onto silica gel (10 g). Purification by chromatography on silica gel (450 g) eluting with methanol:methylene chloride (1:39 to 1:24), evaporation, filtration of the resuling solid from a small volume of methanol and drying under high vacuum gave diethyl(E)-N-(4-(2-(1,2-dihydro-3-methyl-1-oxobenzo[f]quinazolin-9-yl)vinyl)benzoyl)-L-glutamate (0.22 g). 1H NMR (DMSO-d6, 300 MHz) δ: 1.17 (t, J=7 Hz, 3H, ester CH3), 1.20 (t, J=7 Hz, 3H, ester CH3), 1.95-2.20 (m, 2H, glu CH2), 2.44 (s, 3H, C3—CH3), 2.47 (t, J=7 Hz, 2H, gluCH2), 4.06 (q, J=7 Hz, 2H, ester CH2), 4.12 (q, J=7 Hz, 2H, ester CH2), 4.41-4.51 (m, 1H, gluCH), 7.50(d, J=16.5 Hz, 1H, vinyl CH), 7.61 (d, J=9 Hz, 1H, Ar), 7.64 (d, J=16.5 Hz, 1H, vinyl CH), 7.83 (d, J=8.5 Hz, 2H, Ar), 7.93 (d, J=8.5 Hz, 2H, Ar), 8.05 (s, 2H, Ar), 8.24 (d, J=9 Hz, 1H, Ar), 8.76 (d, J=7.5 Hz, 1H, glu NH), 9.96 (s, 1H, Ar), 12.58 (br, s, 1H, N2H). Mass spectrum (Cl—CH4): 542 (M+1, 100%). Anal. Calculated for C31H31N3O6.0.55 H2O: C, 67.51; H, 5.87; N, 7.62. Found: C, 67.40; H, 5.72; N, 7.67
