Triethylamine → 2-Chloro-N-[(1R)-6-(9-pyridin-4-yl-2,9-diazaspiro[5.5]undecane-2-carbonyl)-2,3-dihydro-1H-inden-1-yl]-benzamide

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Reaction Conditions

Reaction Steps

A mixture of (R)—N-(6-(2,9-diazaspiro[5.5]undecane-2-carbonyl)-2,3-dihydro-1H-inden-1-yl)-2-chlorobenzamide hydrochloride (0.491 mmol, 1.0 eq.), triethylamine (5.0 eq.) and 4-chloropyridine hydrochloride (3.0 eq.) in n-butanol (13 ml) was stirred at 110° C. overnight. Ethyl acetate and sat. NaHCO3 solution were added and the aqueous phase was extracted with ethyl acetate a further 4×. The combined organic phases were washed 1× with sat. NaCl solution, dried over sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by column chromatography (silica, ethyl acetate/ethanol/ammonia (25% aq) 100:10:1) to obtain the desired product (H-54). Yield: 73%

Provenance & Evidence