反应详情

7-Bromo-2-ethoxymethyl-1-isobutyl-1H-imidazo[4,5-c]quinolin-4-amine and thiophene-3-boronic acid were coupled according to the general procedure described in Part J of Example 1. Recrystallization from isopropanol followed by purification on silica gel (5% methanol in CH2Cl2 to 7% methanol in CH2Cl2 gradient) afforded 2-ethoxymethyl-1-isobutyl-7-(thiophen-3-yl)-1H-imidazo[4,5-c]quinolin-4-amine as a pale yellow solid, m.p. 187–189° C.

1. customRecrystallization from isopropanol
2. customfollowed by purification on silica gel (5% methanol in CH2Cl2 to 7% methanol in CH2Cl2 gradient)