摘要:
Compounds of formula (I) wherein: R1, R2 which are the same or different, are a hydrogen atom, or a -(CH2)m-O-(CH2)n-R3 group, wherein R3 is an aryl residue, m is an integer 1 to 5 and n is an integer 1 to 4, with the proviso that R1 and R2 cannot be at the same time hydrogen, as well as the optically active forms of the chelates thereof with Mn(II) and the salts thereof with physiologically compatible organic bases selected from primary, secondary, tertiary amines or basic amino acids, or with inorganic bases whose cations are sodium, potassium, magnesium, calcium, or mixtures thereof, are disclosed.
摘要:
The invention relates to a process for the preparation of a compound of formula (I), wherein R represents a 2,3-dihydroxy-1-propyl or a 1,3-dihydroxy-2-propyl radical, via direct amidation of a dialkyl ester of 5-amino-1,3-benzenedicarboxylic acid of formula (V), wherein R1 represents a straight or branched (C1-C4)-alkyl group, with at least the stoichiometric amount of an amine of formula H2NR.
摘要:
The present invention relates to a process for the preparation of given carboxamido compounds, in particular of 2,4,6-triiodoisophthalic acid derivatives, as useful intermediates for the preparation of X-ray contrast media among which is iopamidol. The said process comprises reacting suitable N-sulfinyl intermediate compounds with a commercially available α-hydroxyacid or a salt thereof.
摘要:
The present invention relates to a novel process for the preparation of bile esters derivatives of general formula (I), in which R0 is H or OH; R1 is H, α-OH or β-OH; R2 and R3 are independently hydrogen, straight or branched (C1-C20) alkyl optionally substituted with aryl; R5 is a straight or branched (C1-C4) alkyl and R6 is a straight or branched (C1-C4) alkyl or a benzyl group, via transamidation of the amine (V) with the 5-ocoproline derivative (II), wherein R4 is selected from the group consisting of tertbutoxycarbonyl, methoxycarbonyl, ethoxycarbonyl, 2-trimethylsilylethoxycarbonyl, cyclobutoxycarbonyl and 1-methylcyclobutoxy carbonyl, followed by the selective cleavage of the protecting group R4 under acidic conditions.
摘要:
The use of the complexes of the compounds of general formula (I) with paramagnetic bi-trivalent metal ions selected from the group consisting of Fe?(2+), Fe(3+), Cu(2+), Cr(3+), Gd(3+), Eu(3+), Dy(3+), Yb(3+) or Mn(2+)¿, as well as the salts thereof with physiologically compatible organic bases selected from primary, secondary, tertiary amines or basic amino acids, or with inorganic bases whose cations are sodium, potassium, magnesium, calcium or mixtures thereof. In formula (I) X-L-Y wherein: X is the residue of a polyaminopolycarboxylic ligand and the derivatives thereof, selected from the group consisting of: EDTA, DTPA, DOTA, DO3A, BOPTA; Y is the derivative of a bile acid selected from the group consisting of residues of cholic, chenodeoxycholic, deoxycholic, ursodeoxycholic, lithocholic acids, both as they are and functionalized at the positions having the hydroxy group as the reactive group; L is a chain linked at any position of X and the C-3, C-7, C-12 positions of Y, for the preparation of diagnostic formulations for the imaging of the blood system of the human and animal body, by means of nuclear magnetic resonance; novel compounds of general formula (I) and the diagnostic compositions containing them.
摘要:
The present invention relates to a novel process for the preparation of bile esters derivatives of general formula (I), in which R0 is H or OH; R1 is H, α-OH or β-OH; R2 and R3 are independently hydrogen, straight or branched (C1-C20) alkyl optionally substituted with aryl; R5 is a straight or branched (C1-C4) alkyl and R6 is a straight or branched (C1-C4) alkyl or a benzyl group, via transamidation of the amine (V) with the 5-ocoproline derivative (II), wherein R4 is selected from the group consisting of tertbutoxycarbonyl, methoxycarbonyl, ethoxycarbonyl, 2-trimethylsilylethoxycarbonyl, cyclobutoxycarbonyl and 1-methylcyclobutoxy carbonyl, followed by the selective cleavage of the protecting group R4 under acidic conditions.
摘要:
The invention relates to a process for the preparation of a compound of formula (I), wherein R represents a 2,3-dihydroxy-1-propyl or a 1,3-dihydroxy-2-propyl radical, via direct amidation of a dialkyl ester of 5-amino-1,3-benzenedicarboxylic acid of formula (V), wherein R1 represents a straight or branched (C1-C4)-alkyl group, with at least the stoichiometric amount of an amine of formula H2NR.