Diisopropylethylamine → tert-butyl 5-(2-(3-(2-(4-methylpiperazin-1-yl)acetamido)phenyl)quinazolin-4-ylamino)-1H-indazole-1-carboxylate

Participants

Reaction Steps

A suspension of 2-(4-methylpiperazin-1-yl)acetic acid (34 mg, 0.22 mmol), PyBOP® (11 mg, 0.22 mmol), DIEA (300 μL, 1.72 mmol) in CH2Cl2 (0.5 mL) was stirred at RT for 10-15 minutes. This solution of activated acid was added to a suspension of tert-butyl 5-(2-(3-aminophenyl)quinazolin-4-ylamino)-1H-indazole-1-carboxylate (100 mg, 0.22 mmol) and CH2Cl2 (1 mL). The reaction mixture was stirred at RT for 1.5 h. Activated another 1 equivalent of the acid as described above and it was once again added to the reaction mixture. Stirred for 16 h, diluted with more CH2Cl2 and extracted with H2O (3×). Organic layer was dried under Na2SO4 and concentrated in vacuo to give the desired product tert-butyl 5-(2-(3-(2-(4-methylpiperazin-1-yl)acetamido)phenyl)quinazolin-4-ylamino)-1H-indazole-1-carboxylate.

Provenance & Evidence