反应详情

This was prepared using the same procedure as for 5-bromo-3-nitro-4-(4-(1-(pyridin-2-yl)ethyl)piperazin-1-yl)pyridin-2-amine, but here using tert-butyl 4-((6-(trifluoromethyl)pyridin-3-yl)methyl)piperazine-1-carboxylate (1.1 eq, 0.27 mmol, 93 mg), TFA (1 mL) and CH2Cl2 (3 mL), then 5-bromo-4-chloro-3-nitropyridin-2-amine (62 mg, 0.24 mmol) in iPrOH (3 mL) and DIPEA (1 mL). Filtration and washing as previously described gave the product (78 mg, 63% for two steps) as a yellow solid; δH (500 MHz, DMSO-d6) 2.55 (s, br, 4H, piperazine N(CH2)2), 3.07 (s, br, 4H, piperazine N(CH2)2), 3.69 (s, 2H, NCH2), 6.97 (s, br, 2H, NH2), 7.87 (d, J=8.0 Hz, 1H, pyridine H-5), 8.03 (dd, J=8.0, 0.6 Hz, 1H, pyridine H-4), 8.16 (s, 1H, bromopyridine H-6), 8.71 (d, J=0.6 Hz, 1H, pyridine H-2);

1. customThis was prepared
2. filtrationFiltration
3. washwashing
4. customas previously described gave the product (78 mg, 63% for two steps) as a yellow solid