Hydrochloric Acid → HCID 10253417, compound

Participants

Reaction Steps

4-(1H-Indol-3-yl)butyric acid (232 mg, 1.0 mmol.), the mixture of the diastereoisomers of (4-aminomethyl-1-phenylcyclohexyl)dimethylamine (203 mg, 1.0 mmol.) and 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (415 mg, 1.5 mmol.) were dissolved in abs. methanol and stirred for 20 h at RT. For working up, the mixture was concentrated and the residue was taken up in water (15 ml), adjusted to pH 11 with 5M NaOH and extracted with EE (4×20 ml). The organic phase was washed with 1M NaOH (3 ml), dried, filtered and concentrated. The residue was a mixture of the bases of the diastereoisomeric target products, which were separated by flash chromatography on silica gel (45 g) (eluant: 700 ml methanol/EE 3:1). The non-polar diastereoisomer was obtained in a yield of 163 mg (0.39 mmol.) and was dissolved in 2-butanone/ethanol (7 ml/2 ml); isopropanolic 5M HCl (125 μl, 0.62 mmol.) was added and stirring was carried out for 2 h at RT. Concentration and drying in vacuo yielded the hydrochloride of the non-polar diastereoisomer of N-(4-dimethylamino-4-phenylcyclohexylmethyl)-2-(1H-indol-3-yl)butyramide in the form of a slightly hygroscopic white solid (177 mg, m.p. 95–100° C.).

Provenance & Evidence