CN([CH2:4][N:5]([CH3:7])[CH3:6])C.FC(F)(F)C(O)=O.[C:15]1([C:21]2[C:25]3[C:26](=[O:30])[CH2:27][CH2:28][CH2:29][C:24]=3[O:23][N:22]=2)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.[ClH:31]>>[ClH:31].[CH3:7][N:5]([CH2:4][CH:27]1[C:26](=[O:30])[C:25]2[C:21]([C:15]3[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=3)=[N:22][O:23][C:24]=2[CH2:29][CH2:28]1)[CH3:6]Bis-dimethylaminomethane (0.51 g) was added to 2.5 ml of trifluoroacetic acid which had been previously chilled to -10° C. 6,7-Dihydro-3-phenyl-1,2-benzisoxazol-4(5H)-one (1.0 g) was then added and the reaction was warmed for 1 hour at 100° C. and then allowed to stand an additional 2 days at room temperature. The reaction mixture was poured into 5% HCl and washed with ether, after which the aqueous phase was treated with solid sodium bicarbonate until basic. Extraction with ether followed by drying and concentration gave an oil. The hydrochloride was formed in ethereal HCl and was recrystallized from dichloromethane/ether to give 0.95 g of 6,7-dihydro-5-dimethylaminomethyl-3-phenyl-1,2-benzisoxazol-4(5H)-one hydrochloride, m.p. 178°-180° C.
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