1,1'-Carbonyldiimidazole → Propane-2-sulfonic acid {17-[2-(3-fluoro-phenyl)-7-methoxy-8-methyl-quinazolin-4-yloxy]-13-methyl-2,14-dioxo-3,13-diazatricyclo[13.3.0.0*4,6*]octadec-7-ene-4-carbonyl}-amide

Participants

Reaction Conditions

Reaction Steps

A mixture of the acid 159 (71 mg, 0.115 mmol) and CDI (37 mg, 0.228 mmol) in dry THF (10 mL) was heated at reflux for 2 h under N2. The reaction mixture was cooled 50° C. and a pre-mixed solution of methyl-cyclopropyl sulfonamide (43 mg, 0.349 mmol) and DBU (49 μL, 0.322 mmol) in 2 ml of dry THF was added to the reaction mixture. The reaction was stirred at 50° C. for 18 h. The solvent was evaporated and the residue was dissolved in CHCl3 and washed with citric acid (10% aq). The organic phase was dried with Na2SO4, filtered and the solvent was removed by rotary evaporation. The crude product was purified by HPLC on an Ace-5 C8 column (100×21.2 mm) with a gradient going from 35 to 60% acetonitrile (0.1% TFA) in H2O (0.1% TFA) over 8 minutes. The product was obtained as a white solid (30 mg, 36%), LRMS (M+H) 722.

Provenance & Evidence