Resolution of intermediates in the synthesis of...

C - Chemistry – Metallurgy – 07 – C

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C07C 315/06 (2006.01) C07C 315/04 (2006.01) C07C 317/28 (2006.01) C07C 319/28 (2006.01) C07C 317/46 (2006.01) C07C 323/52 (2006.01)

Patent

CA 2389100

A method of preparing a substantially pure enantiomer of an acylanilide such as Casodex® (bicalutamide) and/or its derivatives includes resolving an intermediate compound having the structure of Formula (I), wherein: R1 is alkyl or haloalkyl having up to 4 carbons; R2 is alkyl having up to 6 carbon atoms; R3 is a direct link or alkyl having up to 6 carbon atoms; R4 is alkyl, alkenyl, hydroxyalkyl or cycloalkyl each of up to 6 carbons; or R4 is phenyl which bears one, two or three substituents independently selected from hydrogen, halogen, nitro, carboxy, carbamoyl and cyano, and alkyl, alkoxy, alkanoyl, alkylthio, alkylsulphinyl, alkylsulphonyl, perfluoroalkyl, perfluoroalkylthio, perfluoroalkylsulphinyl, perfluoroalkylsulphonyl, alkoxycarbonyl and N-alkylcarbamoyl each of up to 4 carbon atoms, and phenyl, phenylthio, phenylsulphinyl and phenylsulphonyl; or R4 is naphthyl; or R4 is a 5- or 6-membered saturated or unsaturated heterocyclic which contains one, two or three heteroatoms selected from oxygen, nitrogen and sulfur, which heterocyclic may be a single ring or may be fused to a benzo-ring, and which heterocyclic is unsubstituted or bears one or two halogen, cyano or amino, or alkyl, alkoxy, alkylthio, alkylsulphinyl or alkylsulphonyl each of up to 4 carbon atoms, or oxy or hydroxy substituents, or which if sufficiently saturated may bear one or two oxo substituents; and X1 is oxygen, sulfur, sulphinyl (-SO-), sulphonyl (-SO2-), imino (-NH-) or alkylimino (-NR5-) where R5 is alkyl having up to 6 carbon atoms. The resolved intermediate compound of Formula (I) is then treated under conditions sufficient to provide a substantially pure enantiomer of an acylanilide such as Casodex® (bicalutamide) and/or its derivatives.

L'invention concerne un procédé de préparation d'un énantiomère sensiblement pur d'un acylanilide, tel que Casodex® (bicalutamide), et/ou ses dérivés, procédé qui consiste à dédoubler un composé intermédiaire ayant la structure représentée par la formule (I) dans laquelle R?1¿ est alkyle ou haloalkyle ayant jusqu'à 4 atomes de carbone; R?2¿ est alkyle ayant jusqu'à 6 atomes de carbone; R?3¿ est une liaison directe ou alkyle ayant jusqu'à 6 atomes de carbone; R?4¿ est alkyle, alcényle, hydroxyalkyle, ou cycloalkyle ayant chacun jusqu'à 6 atomes de carbone; ou R?4¿ est phényle comportant un, deux ou trois substituants indépendamment sélectionnés parmi hydrogène, halogène, nitro, carboxy, carbamoyle et cyano, et alkyle, alcoxy, alkanoyle, alkylthio, alkylsulphinyle, alkylsulphonyle, perfluoroalkyle, perfluoroalkylthio, perfluoroalkylsulphinyle, perfluoroalkylsulphonyle, alcoxycarbonyle et N-alkylcarbamoyle comprenant chacun jusqu'à 4 atomes de carbone, et phényle, phénylthio, phénylsulphinyle et phénylsulphonyle, ou R?4¿ est naphtyle; ou R?4¿ est un hétérocyclique saturé ou non saturé à 5 ou 6 éléments, qui contient un, deux, ou trois hétéroatomes sélectionnés parmi oxygène, nitrogène, et soufre, l'hétérocyclique pouvant être un noyau unique ou être fusionné à un noyau benzo et étant non substitué ou comportant un ou deux halogène, cyano ou amino, ou alkyle, alcoxy, alkylthio, alkylsulphinyle ou alkylsulphonyle comprenant chacun jusqu'à 4 atomes de carbone, ou des substituants oxy ou hydroxy, ou ledit hétérocyclique, si suffisamment saturé, pouvant comporter un ou deux substituants oxo; et X?1¿ est oxygène, soufre, sulphinyle (-SO-), sulphonyle (-SO¿2?-), imino (-NH-) ou alkylimino (-NR?5¿-) où R?5¿ est alkyle ayant jusqu'à 6 atomes de carbone. Le composé intermédiaire dédoublé de formule (I) est ensuite traité dans des conditions suffisantes pour fournir un énantiomère sensiblement pur d'un acylanilide, tel que Casodex® (bicalutamide), et/ou ses dérivés.

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