Abstract: The invention relates to a method of separating and isolating an acylated derivative of 4-[(S)-4-dimethylamino-1-(4-fluorophenyl)-1-hydroxybutyl]-3-hydroxymethylbenzonitrile by reaction of a mixture of the 4-[(S)-4-dimethylamino-1-(4-fluorophenyl)-1-hydroxy-butyl]-3-hydroxymethylbenzonitrile and an acylated derivative thereof with a compound which form a derivative of the 4-[(S)-4-dimethylamino-1-(4-fluorophenyl)-1-hydroxy-butyl]-3-hydroxymethylbenzonitrile containing a carboxylic acid group. The acylated derivative containing a carboxylic acid group precipitates once it is formed and may easily be separated from the reaction mixture.

Abstract: The present invention relates to a novel method for the preparation of diol intermediates having the formula (II) and/or the opposite enantiomer of an acylated diol having the formula (IV) useful for the preparation of escitalopram involving selective enzymatic acylation or deacylation.

Abstract: 4-((1R,3S)-6-Chloro-3-phenylindan-1-yl)-1,2,2-trimethylpiperazine hydrogen succinate or hydrogen malonate, pharmaceutical compositions containing these salts and the medical use thereof, including for the treatment of schizophrenia and other psychotic disorders. Also described are methods for the preparation of 4-((1R,3S)-6-Chloro-3-phenylindan-1-yl)-1,2,2-trimethylpiperazine and medical uses thereof.

Abstract: A compound 4-((1R,3S)-6-Chloro-3-phenylindan-1-yl)-2,2-dimethylpiperazine and salts thereof, pharmaceutical compositions comprising the compound and salts, and medical use thereof, including for treatment of schizophrenia and other psychotic disorders.