Hydrochloric Acid → 3-(2-Amino-5-cyanophenyl)-2-(2-diethylaminoethyl)isoindolin-1-one

Participants

Reaction Steps

To a solution of 2.50 g of 2-cyano-11-hydroxy-5, 11-dihydro-6H-dibenz[b,e]azepin-6-one and 1.78 g of pyridine in 40 ml of methylene chloride was added 1.78 g of thionyl chloride under ice cooling. The mixture was stirred for an hour and ice cooling and then at room temperature for 30 minutes. The reaction solution was added to a solution of 5.81 g of N,N-diethylethylenediamine in 50 ml of methylene chloride at -5° to 0° C. with stirring. After stirring for an hour under ice cooling, 5 ml of water was added thereto. Further 200 ml of methylene chloride and 100 ml of water were added to the reaction mixture, and pH was adjusted to 1 with 4N-hydrochloric acid. After shaking, the organic layer was discarded and 200 ml of methylene chloride was added to the aqueous layer. The pH was adjusted to 10 with 10N-sodium hydroxide solution. After shaking, the aqueous layer was discarded and the organic layer was washed with saturated aqueous sodium chloride solution. After drying over anhydrous sodium sulfate, the organic layer was concentrated under reduced pressure. The crude product obtained was subjected to silica gel column chromatography (eluting solvent, ethyl acetate:hexane:triethylamine=16:4:1). A major fraction was concentrated to dryness under reduced pressure to give 1.42 g of 3-(2-amino-5-cyanophenyl)-2-(2-diethylaminoethyl)isoindolin-1-one (Compound 31).

Provenance & Evidence