Copper mediated C–H amination with oximes: en route to primary anilines

Here we report an efficient Cu(i)-mediated C–H amination reaction with oximes as amino donors to introduce NH(2) groups directly. Various strongly coordinating heterocycles including quinoline, pyrimidine, pyrazine, pyrazole and triazole were tolerated well. The potential utility was further demonstrated in a late-stage modification of telmisartan (an antagonist for the angiotensin II receptor).