Diisopropylethylamine → HCID 86591333, compound

Participants

Reaction Steps

Boc-piperazine (122 mg, 0.65 mmol) was added to the solution of (2-Chloro-pyrido[2,3-d]pyrimidin-4-yl)-(2,4-dichloro-benzyl)-amine(185 mg, 0.54 mmol) and N,N-diisopropylethylamine (145 μL, 0.82 mmol) in n-butanol (2 mL). The reaction mixture was stirred at 85° for 10 h. All starting material was consumed as seen on HPLC. The reaction mixture was concentrated at room temperature under vacuo. The resulting residue was suspended in 2 mL of TFA-CH2Cl2 (1:1) mixture and stirred at room temperature for 45 minutes. The reaction mixture was concentrated in vacuo, diluted with saturated aqueous sodium bicarbonate solution. The aqueous layer was extracted with CH2Cl2 (2×10 mL), dried (Na2SO4) and concentratd to furnish (2,4-Dichloro-benzyl)-(2-piperazin-1-yl-pyrido[2,3-d]pyrimidin-4-yl)-amine(210 mg) as pale brown oil. The crude was carried forward as such in the next reaction.

Provenance & Evidence