Aminated polyamines

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

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C514S674000

Reexamination Certificate

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07423182

ABSTRACT:
An aminated polyamine having the formula:or its possible stereoisomers or a salt thereof with a pharmaceutically acceptable acid wherein:R1and R4may be the same or different and are alkyl, aryl, aryl alkyl or cycloalkyl, optionally having an alkyl chain interrupted by at least one etheric oxygen atom;R2and R3may be the same or different and are R1, R4or H;N1, N2, N3and N4are nitrogen atoms capable of protonation at physiological pH's;ALK1, ALK2AND ALK3may be the same or different and are straight or branched chain alkylene bridging groups having 1 to 4 carbon atoms which effectively maintain a predetermined distance between the nitrogen atoms such that the polyamine upon uptake by the target cell, competitively functions in a manner wherein at least one of said bridging groups ALK1, ALK2and ALK3contains at least one —CH(NRH)— group which is not alpha- to either of the nitrogen atoms and R is H, alkyl, acyl or sulfonyl.

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Communication dated May 15, 2008 in EP 04 80 0606 transmitting Supplementary Partial European Search Report.
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