Isobutyramide → N-[4-amino-2-ethoxymethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]ethanesulfonamide

Participants

Reaction Steps

The general method described in Part A of Example 3 was followed using 7-bromo-2-ethoxymethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-4-amine (U.S. Patent Application Publication No. US 2004/0147543, Examples 125-135) in lieu of 7-bromo-2-ethoxymethyl-1-(3-isopropoxypropyl)-1H-imidazo[4,5-c]quinoline and ethanesulfonamide in lieu of isobutyramide. Purification using a HORIZON HPFC system (silica cartridge, eluting with a linear gradient of 2-25% CMA in chloroform), followed by recrystallization from acetonitrile afforded 0.108 g of N-[4-amino-2-ethoxymethyl-1-(2-hydroxy-2-methylpropyl)-1H-imidazo[4,5-c]quinolin-7-yl]ethanesulfonamide as white crystals, mp 124.0-127.0° C.

Provenance & Evidence