3-(1,3,2-Dioxaborinan-2-yl)pyridine → HCID 58681256, Verbindung

Beteiligte Stoffe

Reaktionsschritte

(S)-7-Bromo-1-[(2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-2-ethoxymethyl-1H-imidazo[4,5-c]quinolin-4-amine (2.65 g, 6.09 mmol) and pyridine-3-boronic acid 1,3-propanediol cyclic ester (1.19 g, 7.30 mmol) were coupled according to the method described in Examples 118–121. The work-up procedure described in Part F of Examples 125–135 was followed. The crude product was purified by HPFC (eluting with chloroform:CMA in a gradient from 100:0 to 80:20) followed by recrystallization from acetonitriled to provide 1.43 g of (S)-1-[(2,2-dimethyl-1,3-dioxolan-4-yl)methyl]-2-ethoxymethyl-7-(pyridin-3-yl)-1H-imidazo[4,5-c]quinolin-4-amine as a white solid, mp 157–158° C.

Herkunft & Nachweise