Trifluoroacetic acid → 10-(8-Aza-bicyclo[3.2.1]oct-3-yl)-6-methoxy-10H-phenoxazine-3-carboxylic acid diethylamide

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Reaction Steps

To a solution of the TFA salt of 10-(8-methyl-8-aza-bicyclo[3.2.1]oct-3-yl)-10H-phenoxazine-3-carboxylic acid diethylamide, 4e (110 mg, 0.25 mmol) in methylene chloride (10 mL) was added 1-chloroethyl chloroformate (0.58 mL, 0.75 mmol). The mixture was heated to reflux for 2 h. The mixture was evaporated, dissolved in methanol (5 mL), and heated for 2 h at reflux. Water was added, and the solution was extracted with methylene chloride. The organic phase was separated, evaporated, and purified via reverse phase HPLC to yield 69 mg (44.8%) of title compound 10-(8-aza-bicyclo[3.2.1]oct-3-yl)-6-methoxy-10H-phenoxazine-3-carboxylic acid diethylamide, 5e, as a TFA salt. MS m/z=422 (M+1).

Provenance & Evidence