[EN] NEW CONTRAST AGENT FOR USE IN MAGNETIC RESONANCE IMAGING [FR] NOUVEL AGENT DE CONTRASTE DESTINÉ À ÊTRE UTILISÉ DANS L'IMAGERIE PAR RÉSONANCE MAGNÉTIQUE
[EN] NEW CONTRAST AGENT FOR USE IN MAGNETIC RESONANCE IMAGING<br/>[FR] NOUVEL AGENT DE CONTRASTE DESTINÉ À ÊTRE UTILISÉ DANS L'IMAGERIE PAR RÉSONANCE MAGNÉTIQUE
申请人:BAYER AG
公开号:WO2022194777A1
公开(公告)日:2022-09-22
The present invention relates to a new class of compounds of general formula (I), the Gd3+chelate complexes thereof, to methods of preparing said compounds, and to the use of said compounds as MRI contrast agents. Formula (I)
Enantioselective synthesis of unsaturated α-hydroxy acids
作者:Jacqueline A. Macritchie、Alan Silcock、Christine L. Willis
DOI:10.1016/s0957-4166(97)00571-5
日期:1997.12
(S)- and (R)-2-Hydroxyhex-5-enoic acid and (S)- and (R)-2-hydroxyhept-6-enoic acid were prepared in excellent yields and enantiomeric excesses (>99% ee) from the corresponding α-keto esters by the enzyme catalysed hydrolysis of the ester and reduction of the ketone in a single pot process. The enantioselectivesynthesis of (S)-2-hydroxypent-4-enoic acid was achieved via reaction of the reagent derived