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With hydrogenchloride; In 1,4-dioxane; 1-methyl-pyrrolidin-2-one; at 140℃; for 1h;
A mixture of 2, 5-dimethylindole (765 mg) and 4-chloro-8-trifluoromethylquinoline (1.22 g) in NMP (1.5 ml) and 4M HCI in dioxane (0.2 ml) was heated at [140 C] for 1 h. After cooling the mixture was triturated with ether and filtered to give the sub-title compound (1.33 g) as a dark red solid. MS: ESI (+ve): 341 [[M+H] + 100%]
With hydrogenchloride; In 1,4-dioxane; at 80 - 100℃; for 1h;
[A] solution of 2,5-dimethylindole (675 mg) in dioxane (1.5 ml) was added to a solution of 4-chloro-8-trifluoromethylquinoline (1.08 g) in 2M HCl in dioxane (2.2 [ML)] at [80 C] and the resultant solution was heated at [100 C] for lh. After cooling the mixture was diluted with ether and the precipitate was collected to give the sub-title compound (1.44 g), identical to that prepared above.