Hydrochloric Acid → 2,3-Dihydro-2-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-3-methylene-1H-isoindol-1-one hydrochloride

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Reaction Steps

To the solution of 2,3-dihydro-2-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-3-hydroxy-3-methyl-1H-isoindol-1-one (4.88 g, 11.9 mmol) in chloroform (50 ml) was added HCl ether (1M, 20 ml) solution. A precipitate formed. This mixture was stirred for 18 hours at room temperature. The mixture was basified with triethylamine and washed with brine. The organic solution was dried and concentrated to a crude material. The purification was done by flash chromatography over silica gel column (SiO2, 60 g; eluted with DCM). The pure product thus obtained weighed 3.28 g (70%). Treatment with HCl.ether solution in ethanol gave 1.52 g of white crystals, m.p.=261°-263° C.

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