Regioselective reduction of fused pyrrolocarbazoles -5,7-diones

Details Regioselective reduction of fused pyrrolocarbazoles -5,7-diones Regioselective reduction of fused pyrrolocarbazoles -5,7-diones

C - Chemistry, Metallurgy

07

D

C07D 487/14 (2006.01) A61K 31/4162 (2006.01) A61P 35/00 (2006.01)

Patent

CA 2743097

The present invention relates to a method for regioselectively reducing the maleimide compounds of formula (I). The invention also relates to C7 hydroxy lactam regioisomers of formula (II) obtainable by this method and their use for the preparation of lactams of formula (III) which are particularly useful as intermediate for the synthesis of fused pyrrolocarbazoles.

La présente invention concerne un procédé pour réduire de manière régiosélective les composés maléimide de formule (I). Linvention concerne en outre des régio-isomères de C7-hydroxylactame de formule (II) pouvant être obtenus par ce procédé et leur utilisation pour la préparation de lactames de formule (III) qui sont particulièrement utiles en tant quintermédiaire pour la synthèse de pyrrolocarbazoles condensés.

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