Abstract:
Disclosed is a process for the synthesis of iloperidone starting from 4-hydroxy-3-methoxy acetophenone (acetovanillone), 1-chloro-3-bromo propane and 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole hydrochloride, using a one-pot method.
Said process is performed without any intermediate isolation, and is particularly advantageous from the environmental standpoint and in terms of yields, productivity and the purity of the product obtained, both in the reaction mixture and in the crystal isolated.
Abstract:
A process for the enantiomeric resolution of 1-substituted 2-(aminomethyl)pyrrolidines of formula (I)
in which R is C1-C6 alkyl, which process comprises the reaction of the racemic amine with benzyl acetate in acetonitrile in the presence of a lipase selected from Pseudomonas cepacia, Pseudomonas fluorescens or Candida rugosa lipases, to give the corresponding 1-substituted N-(pyrrolidin-2-yl-methyl)-acetamides of formula (II), with R configuration,
and the residual amine with S configuration, and, if desired, the subsequent hydrolysis of the amide to obtain the amine with R configuration.
Abstract:
A process for the preparation of Dalfampridine (1), 4-aminopyridine, starting from 4-pyridinecarbonitrile using a one-pot procedure.
Said process is carried out with no need for isolating intermediates and is particularly advantageous as far as environment, yields, productivity and purity of the resulting product are concerned, both in the reaction mixture and in the isolated crystal.
Abstract:
A process for the enantiomeric resolution of 1-substituted 2-(aminomethyl)pyrrolidines of formula (I)
in which R is C1-C6 alkyl, which process comprises the reaction of the racemic amine with benzyl acetate in acetonitrile in the presence of a lipase selected from Pseudomonas cepacia, Pseudomonas fluorescens or Candida rugosa lipases, to give the corresponding 1-substituted N-(pyrrolidin-2-yl-methyl)-acetamides of formula (II), with R configuration,
and the residual amine with S configuration, and, if desired, the subsequent hydrolysis of the amide to obtain the amine with R configuration.