Triethylamine → 5-Chloro-N-[1-({3-[({[(1,1-dimethylethyl)amino]carbonyl}amino)methyl]phenyl}methyl)-4-(methyloxy)-1H-indazol-3-yl]-2-thiophenesulfonamide

Participants

Reaction Steps

To a suspension of N-[1-{[3-(aminomethyl)phenyl]methyl}-4-(methyloxy)-1H-indazol-3-yl]-5-chloro-2-thiophenesulfonamide hydrochloride (for a preparation see Intermediate 4) (55 mg, 0.11 mmol) in dry DCM (0.5 mL) was added triethylamine (0.015 mL, 0.11 mmol), followed by tert-butyl isocyanate (0.013 mL, 0.11 mmol). The reaction mixture was stirred at room temperature for 1.5 h. LCMS showed mainly required product with 6% SM. The reaction mixture was diluted with DCM and methanol and then concentrated in vacuo. The resultant residue was dissolved in 1:1 MeOH:DMSO (1 mL) and purified by MDAP (supelcosil ABZ+Plus column) eluting with solvents NB (A: Water+0.1% Formic acid, B: MeCN:Water 95:5+0.05% Formic acid). The solvent was evaporated in vacuo to give the title compound (52 mg, 84%). LCMS (System A) RT=1.15 min, ES+ve m/z 562/564 (M+H)+.

Provenance & Evidence