Diisopropylethylamine → 5-fluoro-N-[1-(3-fluorobenzyl)-1H-indazol-5-yl]quinazolin-4-amine

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A mixture of 4-chloro-5-fluoroquinazoline (1.82 g, 10 mmol), 1-(3-fluorobenzyl)-1H-indazol-5-amine (2.41 g, 10 mmol, obtained as described in WO 98/02438) and diisopropylethylamine (1.74 ml, 10 mmol) in isopropanol (20 ml) was heated at 80° C. for 45 minutes. On cooling to ambient temperature, the product was filtered off and washed with isopropanol and ether. The precipitated solid was dried under high vacuum to give 5-fluoro-N-[1-(3-fluorobenzyl)-1H-indazol-5-yl]quinazolin-4-amine (3.2 g, 83%); NMR Spectrum (CDCl3) 5.61 (s, 2H), 6.88 (d, 1H), 6.98 (m, 2H), 7.25 (m, 2H), 7.37 (d, 1H), 7.53 (dd, 1H), 7.73 (m, 2H), 8.09 (s, 1H), 8.19 (s, 1H), 8.49 (d, 1H), 8.69 (s, 1H); Mass spectrum MH+ 388.

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