N-(tert-butoxycarbonyl)glycine → {[4-(6-Chloro-3-methyl-4,10-dihydro-3H-2,3,4,9-tetraaza-benzo[f]azulene-9-carbonyl)-2-fluoro-benzylcarbamoyl]-methyl}-carbamic Acid Tert-butyl Ester

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HBTU (165 mg, 0.44 mmol) was added to a solution of N-(tert-butoxycarbonyl)glycine (65 mg, 0.37 mmol) in DMF (10 ml) and the mixture was stirred for 30 min at room temperature. (4-Aminomethyl-3-fluoro-phenyl)-(6-chloro-3-methyl-4,10-dihydro-3H-2,3,4,9-tetraaza-benzo[f]azulen-9-yl)-methanone hydrochloride from Example E102.2 (100 mg, 0.22 mmol) and DIEA (0.228 ml, 1.31 mmol) were added and the mixture was stirred for 24 h at room temperature. The solution was diluted with EtOAc, washed with water then brine, dried and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (eluant; 5% methanol:95% dichloromethane then 10% methanol:90% dichloromethane) to give a white solid identified as the title compound (123 mg, 100%).

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