Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atomic Energy CouncilfiledCriticalAtomic Energy Council
Priority to TW94104788ApriorityCriticalpatent/TWI289550B/en
Publication of TW200630322ApublicationCriticalpatent/TW200630322A/en
Application grantedgrantedCritical
Publication of TWI289550BpublicationCriticalpatent/TWI289550B/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
The present invention relates to a preparation method of diethylenetriaminepentaacetic acid (DTPA) derivatives comprising preparing penta-alkyl DTPA and selectively hydrolyzing to obtain tetra-alkyl DTPA using metal ion as catalyst. The method of the invention uses two reaction steps to prepare DTPA derivatives having unit activity.
TW94104788A2005-02-182005-02-18Preparation method of diethylenetriaminepentaacetic acid derivatives
TWI289550B
(en)
A process for the preparation of 17-hydroxy-6 beta, 7 beta, 15 beta, 16 beta -bismethylene-17 alpha-pregn-4-ene-3-one-21-carboxylic acid lambda-lactone and key-intermediates for this process