Bicyclo[2.2.1]heptane-1-methanesulfonic acid, 7,7-dimethyl-2-oxo-, (1S)- → HCID 57677469, compound

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Reaction Steps

To a solution of 4-(4-aminophenoxy)-2-{[4-(1-methylpiperidin-4-yl)piperazin-1-yl]carbonylamino}pyridine (153 mg) and (+)-10-camphorsulfonic acid (162 mg) in ethanol (4.0 ml) was added a solution of 2-phenylacetyl isothiocyanate in toluene (0.25 M, 2.93 ml) at room temperature, followed by stirring for 3 hours. The reaction mixture was partitioned between ethyl acetate and a saturated aqueous solution of sodium hydrogencarbonate. The organic layer was washed with a saturated aqueous solution of sodium hydrogencarbonate and brine in this order, dried over anhydrous sodium sulfate. The solvent was evaporated to give a residue, which was then purified by silica gel column chromatography (Fuji Silysia NH, eluent; ethyl acetate, then ethyl acetate:methanol=98:2) to provide the titled compound (71.8 mg, 33%) as white powder.

Provenance & Evidence