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Research paper thumbnail of Procede pour la preparation d'acide triacetique 1,4,7,10-tetraazacyclododecane-1,4,7 et derives de ce dernier

L'invention concerne un procede pour la preparation de 1,4,7,10-tetraazacyclododecane-1,4,7-t... more L'invention concerne un procede pour la preparation de 1,4,7,10-tetraazacyclododecane-1,4,7-triacetique et des sels de ces derniers, selon la formule (I). Ce procede comprend les etapes consistant a (a) assurer la carboxymethylation d'un precurseur approprie dans de l'eau avec un acide haloacetique; (b) mettre en oeuvre l'hydrolyse dans des conditions basiques en ajoutant la meme la base qu'au cours de l'etape precedente.

Research paper thumbnail of Procede visant a la production d'un dichlorure d'acide dicarboxylique

Cette invention a trait a un procede visant a la production d'un dichlorure d'acide S-(-)... more Cette invention a trait a un procede visant a la production d'un dichlorure d'acide S-(-)-5-[[2-(acetyloxy)-1-oxopropyl]-amino]-2,4,6-triiodo-1,3-dicarboxylique benzene de la formule (I), consistant a faire reagir un chlorure d'acide S-(-)-2-[(acetyloxy)]propionique avec un dichlorure 5-amino-2,4,6-triiodo-1,3-dicarboxylique benzene dans un solvant aprotique dipolaire et en presence d'un acide halogenhydrique.

Research paper thumbnail of Process for the preparation of an aromatic acid halosubstituted

Research paper thumbnail of PROCESS FOR PRODUCING 5H, 9bH-2a, 4a, 7,9a-octahydro-TETRAAZACYCLOOCTA ÄcdÜ Pentalene

Research paper thumbnail of A process for preparing halo-substituted aromatic acid

The present invention relates to a method SE PAR ALA Preparation of 5-amino-2,4,6-triiodo-1,3BENC... more The present invention relates to a method SE PAR ALA Preparation of 5-amino-2,4,6-triiodo-1,3BENCENODICARBOXILICO, comprising the steps: a) catalytic hydrogenation of 5-NITRO-1,3BENCENODICARBOXILICO IN A MEANS neutral or basic, which provides a AQUEOUS SOLUTION OF SODIUM SALT OF 5-AMINO1,3-benzenedicarboxylic; B) DIRECT iodine treatment solution sodium salt of 5-amino-1,3BENCENODICARBOXILICO derived from step a), without purification BACK WITH ICI SOLUTION IN HCI, with the salt solution SODIUM ACID 5-amino-benzenedicarboxylic ADDED TO PREVIOUSLY HCI YH {SUB, SUB 2} SO {4}.

Research paper thumbnail of A method for cleaning opacifying contrast agents

Research paper thumbnail of Procede de preparation d'un acide aromatique halo-substitue

La presente invention se rapporte a un procede de preparation de l'acide 5-amino-2,4,6,triiod... more La presente invention se rapporte a un procede de preparation de l'acide 5-amino-2,4,6,triiodo-1,3-benzenedicarboxylique comprenant les etapes suivantes: a) l'hydrogenation catalytique de l'acide 5-nitro-1,3-benzene dicarboxylique dans un environnement neutre ou basique qui permet d'obtenir une solution aqueuse de sel de sodium de l'acide 5-amino-1,3-benzenedicarboxylique; b) l'iodation directe de la solution de sel de sodium de l'acide 5-amino-1,3-benzenedicarboxylique obtenue a l'etape a), sans purification supplementaire, avec une solution de ICl dans HCl, la solution de sel de sodium de l'acide 5-amino-1,3-benzene dicarboxylique ayant ete auparavant ajoutee avec HCl et H2SO4.

Research paper thumbnail of Process for the preparation of an iodinating agent

A process comprising the following steps: a. oxidize electrochemically 1 mol of starting ICl in a... more A process comprising the following steps: a. oxidize electrochemically 1 mol of starting ICl in acidic aqueous solution, Formore an intermediate derivative with an oxidation state of iodine equal to (III); b. reacting this intermediate derivative with iodine; and c. obtain 3 moles of ICI.

Research paper thumbnail of A process for the concentration and purification of organic compounds

Research paper thumbnail of Process for the Preparation of a Iodinating Agen

Research paper thumbnail of Device and method for the regeneration of mixed ion exchange resin beds

Research paper thumbnail of Process of Concentration and Purification of Organic Compounds

Research paper thumbnail of A process for the preparation of 2-chloro-3-(phenylmethoxy)propionic acid potassium salt

Research paper thumbnail of Process for the recovery of iodine from aqueous solutions containing iodinated organic compounds

Research paper thumbnail of Process for the Preparation of a Halosubstituted Aromatic Acid

Research paper thumbnail of Process for the preparation of 4-carboxy-5, 8,11-tris (carboxymethyl)-phenyl-2-oxa-5, 8 11-triazatridecan

Research paper thumbnail of Process for the preparation of macrocyclic chelants and the chelates thereof with paramagnetic metal ions

Research paper thumbnail of A Process for the Preparation of 4-CARBOXY- 5,8,11- Tris(Carboxymethyl)- 1-PHENYL- 2-OXA- 5,8,11- Triazatridecan- 13-OIC Acid

Research paper thumbnail of Process for the preparation of 1,4,7,10-tetraaza-cyclododecane-1,4,7-triacetic acid and the derivatives thereof

Research paper thumbnail of 5-((ACETYLOXY)-1-OXOPROPYL)AMINO)-2,4,6-TRIIODO-1,3-BENZENEDI Carbonyl Chloride by Reacting 5-AMINO-2,4,6-TRIIODOBENZENE Dicarbonyl Chloride with the Propionyl Chloride Compound Using an Aprotic Dipolar Solvent and Halohydric Acid Catalyst

Research paper thumbnail of Procede pour la preparation d'acide triacetique 1,4,7,10-tetraazacyclododecane-1,4,7 et derives de ce dernier

L'invention concerne un procede pour la preparation de 1,4,7,10-tetraazacyclododecane-1,4,7-t... more L'invention concerne un procede pour la preparation de 1,4,7,10-tetraazacyclododecane-1,4,7-triacetique et des sels de ces derniers, selon la formule (I). Ce procede comprend les etapes consistant a (a) assurer la carboxymethylation d'un precurseur approprie dans de l'eau avec un acide haloacetique; (b) mettre en oeuvre l'hydrolyse dans des conditions basiques en ajoutant la meme la base qu'au cours de l'etape precedente.

Research paper thumbnail of Procede visant a la production d'un dichlorure d'acide dicarboxylique

Cette invention a trait a un procede visant a la production d'un dichlorure d'acide S-(-)... more Cette invention a trait a un procede visant a la production d'un dichlorure d'acide S-(-)-5-[[2-(acetyloxy)-1-oxopropyl]-amino]-2,4,6-triiodo-1,3-dicarboxylique benzene de la formule (I), consistant a faire reagir un chlorure d'acide S-(-)-2-[(acetyloxy)]propionique avec un dichlorure 5-amino-2,4,6-triiodo-1,3-dicarboxylique benzene dans un solvant aprotique dipolaire et en presence d'un acide halogenhydrique.

Research paper thumbnail of Process for the preparation of an aromatic acid halosubstituted

Research paper thumbnail of PROCESS FOR PRODUCING 5H, 9bH-2a, 4a, 7,9a-octahydro-TETRAAZACYCLOOCTA ÄcdÜ Pentalene

Research paper thumbnail of A process for preparing halo-substituted aromatic acid

The present invention relates to a method SE PAR ALA Preparation of 5-amino-2,4,6-triiodo-1,3BENC... more The present invention relates to a method SE PAR ALA Preparation of 5-amino-2,4,6-triiodo-1,3BENCENODICARBOXILICO, comprising the steps: a) catalytic hydrogenation of 5-NITRO-1,3BENCENODICARBOXILICO IN A MEANS neutral or basic, which provides a AQUEOUS SOLUTION OF SODIUM SALT OF 5-AMINO1,3-benzenedicarboxylic; B) DIRECT iodine treatment solution sodium salt of 5-amino-1,3BENCENODICARBOXILICO derived from step a), without purification BACK WITH ICI SOLUTION IN HCI, with the salt solution SODIUM ACID 5-amino-benzenedicarboxylic ADDED TO PREVIOUSLY HCI YH {SUB, SUB 2} SO {4}.

Research paper thumbnail of A method for cleaning opacifying contrast agents

Research paper thumbnail of Procede de preparation d'un acide aromatique halo-substitue

La presente invention se rapporte a un procede de preparation de l'acide 5-amino-2,4,6,triiod... more La presente invention se rapporte a un procede de preparation de l'acide 5-amino-2,4,6,triiodo-1,3-benzenedicarboxylique comprenant les etapes suivantes: a) l'hydrogenation catalytique de l'acide 5-nitro-1,3-benzene dicarboxylique dans un environnement neutre ou basique qui permet d'obtenir une solution aqueuse de sel de sodium de l'acide 5-amino-1,3-benzenedicarboxylique; b) l'iodation directe de la solution de sel de sodium de l'acide 5-amino-1,3-benzenedicarboxylique obtenue a l'etape a), sans purification supplementaire, avec une solution de ICl dans HCl, la solution de sel de sodium de l'acide 5-amino-1,3-benzene dicarboxylique ayant ete auparavant ajoutee avec HCl et H2SO4.

Research paper thumbnail of Process for the preparation of an iodinating agent

A process comprising the following steps: a. oxidize electrochemically 1 mol of starting ICl in a... more A process comprising the following steps: a. oxidize electrochemically 1 mol of starting ICl in acidic aqueous solution, Formore an intermediate derivative with an oxidation state of iodine equal to (III); b. reacting this intermediate derivative with iodine; and c. obtain 3 moles of ICI.

Research paper thumbnail of A process for the concentration and purification of organic compounds

Research paper thumbnail of Process for the Preparation of a Iodinating Agen

Research paper thumbnail of Device and method for the regeneration of mixed ion exchange resin beds

Research paper thumbnail of Process of Concentration and Purification of Organic Compounds

Research paper thumbnail of A process for the preparation of 2-chloro-3-(phenylmethoxy)propionic acid potassium salt

Research paper thumbnail of Process for the recovery of iodine from aqueous solutions containing iodinated organic compounds

Research paper thumbnail of Process for the Preparation of a Halosubstituted Aromatic Acid

Research paper thumbnail of Process for the preparation of 4-carboxy-5, 8,11-tris (carboxymethyl)-phenyl-2-oxa-5, 8 11-triazatridecan

Research paper thumbnail of Process for the preparation of macrocyclic chelants and the chelates thereof with paramagnetic metal ions

Research paper thumbnail of A Process for the Preparation of 4-CARBOXY- 5,8,11- Tris(Carboxymethyl)- 1-PHENYL- 2-OXA- 5,8,11- Triazatridecan- 13-OIC Acid

Research paper thumbnail of Process for the preparation of 1,4,7,10-tetraaza-cyclododecane-1,4,7-triacetic acid and the derivatives thereof

Research paper thumbnail of 5-((ACETYLOXY)-1-OXOPROPYL)AMINO)-2,4,6-TRIIODO-1,3-BENZENEDI Carbonyl Chloride by Reacting 5-AMINO-2,4,6-TRIIODOBENZENE Dicarbonyl Chloride with the Propionyl Chloride Compound Using an Aprotic Dipolar Solvent and Halohydric Acid Catalyst

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