摘要:
A new process for the preparation of diethylenetriaminepentaacetic-monoamides in which amines can be reacted with sensitive groups, a higher mono/diamide selectivity is achieved, a higher yield of monoamide is achieved and has a simple reaction scheme and working-up.
摘要:
A process for the production of of general formula I diethylenetriaminepentacarboxylic acid monoamide derivatives ##STR1## in which E.sup.1, E.sup.2 and Z have varying meanings.
摘要:
What is described is a process for producing high-purity gadobutrol in a purity (according to HPLC) of more than 99.7 or 99.8 or 99.9% and the use for preparing a pharmaceutical formulation for parenteral administration. The process is carried out using specifically controlled crystallization conditions. The more recent developments in the field of the gadolinium-containing MR contrast agents (EP 0448191 B1, CA Patent 1341176, EP 0643705 B1, EP 0986548 B1, EP 0596586 B1) include the MRT contrast agent gadobutrol (Gadovist® 1.0) which has been approved for a relatively long time in Europe and more recently also in the USA under the name Gadavist®.
摘要:
The present invention describes a novel process for preparing an epothilone derivative using substituted pyridines and methyltrioxorhenium as catalyst.
摘要:
This invention describes protected 5,7-dihydroxy-4,4-dimethyl-3-oxoheptanoic acid ester and 5,7-dihydroxy-2-alkyl-4,4-dimethyl-3-oxoheptanoic acid ester for the synthesis of epothilones and epothilone derivatives and process for the production of these esters.
摘要:
The invention relates to a new synthetic process for the production of key intermediates useful in the synthesis of epothilones or epothilone derivatives, to certain compounds used to produce these key intermediates and to a process to produce said compounds.
摘要:
The invention relates to 3,5-dihydroxy-2,2-dimethyl-valeronitriles for the synthesis of epothilones and epothilone derivatives and process for the production of these new intermediate products in the synthesis and the use for the production of epothilones or epothilone derivatives.
摘要:
The invention relates to crystalline lithium complexes of N-(1-hydroxymethyl-2,3-dihydroxypropyl)-1,4,7-triscarboxymethyl-1,4,7,10 tetraazacyclododecane, their production and the recovery of the salt-free gadolinium complex of N-(1-hydroxymethyl-2,3-dihydroxypropyl)-1,4,7-triscarboxymethyl-1,4,7,10 tetraazacyclododecane from the latter without the use of ion exchangers.
摘要:
The invention relates to a process for the production of diethylenetriaminepentacarboxylic acid tetraesters of general formula I ##STR1## in which R.sup.1 and Z have different meanings.