N-demethylation of cyamemazine via non-classical Polonovski reaction and its conjugation to bovine serum albumin
A modified Polonovski reaction has been employed to obtain the N-demethylated metabolite of the neuroleptic drug cyamemazine. The synthesis involves N-oxide formation, isolation of the corresponding N-oxide, and a FeSO4·7H2O mediated Polonovski reaction to afford the desired monodesmethyl cyamemazine. In a subsequent step the hapten N-demethylcyamemazine-hemiglutarate was synthesized and its conjugated to bovine serum albumin (BSA).
Singh, Gurmit,Koerner, Terry B.,Godefroy, Samuel Benrejeb,Armand, Claude
An improved process for the preparation of pure cyamemazine and salts thereof
The present invention provides an improved process for the preparation of cyamemazine of formula-1 or its pharmaceutically acceptable salt thereof, which is substantially free of impurities.
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Page/Page column
(2014/07/09)
Synthesis of deuterium-labeled cyamemazine and monodesmethyl cyamemazine
A novel approach is presented for the synthesis of cyamemazine maleate and N-desmethyl cyamemazine maleate using a 10-(amino-2-methylpropyl)phenothiazine derivative. This method was successfully applied to the synthesis of [ 2H6]cyamemazine maleate and N-desmethyl-[ 2H3]cyamemazine maleate.
Bolla, R. Sekhar,Kasi Viswanath
p. 82 - 85
(2014/03/21)
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