A PROCESS FOR THE PREPARATION OF DECAHYDRO-2A,4A,6A,8A-TETRAAZACYCLOPENT[FG]ACENAPHTHYLENE AND FUNCTIONALIZED DERIVATIVES
申请人:BRACCO International B.V.
公开号:EP1272493B1
公开(公告)日:2005-10-19
US6897311B2
申请人:——
公开号:US6897311B2
公开(公告)日:2005-05-24
[EN] A PROCESS FOR THE PREPARATION OF DECAHYDRO-2A,4A,6A,8A-TETRAAZACYCLOPENT[FG]ACENAPHTHYLENE AND FUNCTIONALIZED DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DECAHYDRO-2A,4A,6A,8A-TETRAAZACYCLOPENT CENT FG!ACENAPHTHYLENE ET DE DERIVES FONCTIONNALISES
申请人:BRACCO INT BV
公开号:WO2001079207A2
公开(公告)日:2001-10-25
A process for the preparation of compound of formula (IA), decahedra-2a,4a,6a,8a-tetraazaccyclopent[fg]acenaphthylene and the corresponding functionalised compounds of general formula (I), which comprises 2 steps; a) the preparation of compounds of general formula (III) and b) subsequent reduction thereof. R are both hydrogen, or one is hydrogen and the other is a straight or branched C1-C4 alkyl group, optionally substituted with one or more -OPg- protected groups, in which Pg is a hydroxy - protecting group. Y1 or Y2 is -CH2-CH2 and the other is -Co-Co- or a group of formula -COCHR, wherein R has the meaning defined above.