Synthesis of Lipophilic Paramagnetic Contrast Agents
摘要:
The facile, high-yielding synthesis of a series of macrocycles 7a-k in 75-100% yield is reported. The transformation of these compounds to their carboxymethylated analogues 8a-k in 75-90% yield and subsequent gadolinium complexes 9a-k provides a series of homologous neutral paramagnetic contrast agents (PCAs) with tunable lipophilicity. Alkylated cationic intermediates 6a-k are prepared in yields of 72-94% from glyoxal adduct of cyclen (5) and slight excesses of alkyl iodides. The methodology is selective for monoalkylation and amenable to large-scale synthesis.
Synthesis of Lipophilic Paramagnetic Contrast Agents
摘要:
The facile, high-yielding synthesis of a series of macrocycles 7a-k in 75-100% yield is reported. The transformation of these compounds to their carboxymethylated analogues 8a-k in 75-90% yield and subsequent gadolinium complexes 9a-k provides a series of homologous neutral paramagnetic contrast agents (PCAs) with tunable lipophilicity. Alkylated cationic intermediates 6a-k are prepared in yields of 72-94% from glyoxal adduct of cyclen (5) and slight excesses of alkyl iodides. The methodology is selective for monoalkylation and amenable to large-scale synthesis.
The present disclosure relates to an automatic dishwasher detergent which comprises metal complex of formula Mn+L(Am−)n/m, wherein M is a metal cation, A is an arbitrary anion, n and m are integers selected from 1 to 6, and L is a neutral ligand of formula (II), wherein each X is as defined herein, and which exhibits improved cleaning performance in the removal of burnt-on soiling, to the use of this dishwasher detergent, and to a method for automatically washing dishes using this dishwasher detergent.
本公开涉及一种自动洗碗机洗涤剂,它包括式 Mn+L(Am-)n/m 的金属络合物,其中 M 是金属阳离子,A 是任意阴离子,n 和 m 是选自 1 到 6 的整数,L 是式 (II) 的中性配体,其中每个 X 如本文所定义,它在去除烧焦的污垢方面具有更好的清洁性能,本公开还涉及这种洗碗机洗涤剂的用途,以及使用这种洗碗机洗涤剂自动清洗餐具的方法。
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
DISHWASHER DETERGENT CONTAINING METAL COMPLEXES
申请人:Henkel AG & Co. KGaA
公开号:US20170321164A1
公开(公告)日:2017-11-09
The present disclosure relates to an automatic dishwasher detergent which comprises metal complex of formula M
n+
L(Am
m−
)
n/m
, wherein M is a metal cation, A is an arbitrary anion, n and m are integers selected from 1 to 6, and L is a neutral ligand of formula (II), wherein each X is as defined herein, and which exhibits improved cleaning performance in the removal of burnt-on soiling, to the use of this dishwasher detergent, and to a method for automatically washing dishes using this dishwasher detergent.
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.