Selective Mono- and 1,4-Di-N-alkylations of 1,4,7,10-Tetraazacyclododecane.
摘要:
General methods for selective N-alkylations of the macrocycle 1,4,7,10-tetraazacyclododecane have been developed. The N-monoalkylation proceeds via a cyclic guanidinium derivative, and the regioselective 1,4-N,N-dialkylation via a cyclic amidinium derivative. All transformations were high yield reactions.
INTERMEDIATES FOR CHELATING AGENTS WITH PREFIXED SYMMETRY AND PROCESS FOR THEIR PREPARATION
申请人:BRACCO S.p.A.
公开号:EP0545983A1
公开(公告)日:1993-06-16
US5424423A
申请人:——
公开号:US5424423A
公开(公告)日:1995-06-13
[EN] INTERMEDIATES FOR CHELATING AGENTS WITH PREFIXED SYMMETRY AND PROCESS FOR THEIR PREPARATION
申请人:BRACCO INDUSTRIA CHIMICA S.P.A.
公开号:WO1992004336A1
公开(公告)日:1992-03-19
(EN) The preparation of compounds of formula (I), wherein R and R1 have the meanings specified in claim 1, is disclosed; compounds (I) are useful intermediates for the preparation of chelating agents.(FR) L'invention décrit la préparation de composés de formule (I) dans laquelle R et R1 ont les significations spécifiées dans la revendication (1); ces composés sont des intermédiaires efficaces pour la préparation d'agents chélatants.