3-Pyridinylboronic acid → tert-butyl {2-[2-butyl-7-(pyridin-3-yl)-1H-imidazo[4,5-c]quinolin-1-yl]ethyl}carbamate

Participants

Reaction Steps

tert-Butyl [2-(4-amino-7-bromo-2-butyl-1H-imidazo[4,5-c]quinolin-1-yl)ethyl]carbamate (14.09 g, 30.5 mmol) and 3-pyridylboronic acid (4.31 g, 35.0 mmol) were coupled according to the method described in Part G of Example 386. The reaction was heated for 2.5 hours. The crude product was triturated with toluene (15 mL/g) at 123° C. and isolated by filtration to provide 11.31 g of tert-butyl {2-[2-butyl-7-(pyridin-3-yl)-1H-imidazo[4,5-c]quinolin-1-yl]ethyl}carbamate as a white solid.

Provenance & Evidence