反应详情

A modification of the method described in Part C of Example 365 was used to treat tert-butyl 2-[(3-amino-7-bromoquinolin-4-yl)amino]ethylcarbamate (66.69 g, 174.9 mmol, U.S. patent application publication no. US 2004/0147543, Example 386, Parts A and B) with triethylamine (35.4 g, 350 mmol) and chloroacetyl chloride (20.7 g, 183 mmol). After the reaction in ethanol was complete, a precipitate was present and was isolated by filtration to provide 38.42 g of tert-butyl 2-[7-bromo-2-(chloromethyl)-1H-imidazo[4,5-c]quinolin-1-yl]ethylcarbamate as white crystals. The filtrate was concentrated under reduced pressure, and the residue was purified by column chromatography on silica gel (eluting with 2 N ammonia in methanol/chloroform in a 33-minute gradient from 0:100 to 5:95) to provide an additional 4.89 g of product.

1. customwas isolated by filtration