Functionalization of carboxylic anhydrides at α-carbon with hypervalent iodine reagents: one-pot conversion of anhydrides to 2-sulfonyloxycarboxylate esters
作者:Jeffrey M Goff、Michael W Justik、Gerald F Koser
DOI:10.1016/s0040-4039(01)01028-0
日期:2001.8
The treatment of carboxylic anhydrides with iodine(III) sulfonate reagents at ca. 100°C and esterification of the reaction mixtures with MeOH/TsOH·H2O affords 2-sulfonyloxycarboxylate esters. This is consistent with enolic behavior in the anhydrides.
[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)