FLERTRINNET FREMGANGSMÅDE TIL FREMSTILLING AF ALKALIMETALSALTE AF SPECIELLE 4-HYDROXY-2-OXO-2,5-DIHYDROFURAN-3-CARBOXYLSYREESTERE

摘要

The present invention relates to a multi-stage method for preparing alkali metal salts of specific 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylic esters of the formula (I), in which M and R1 are as defined in the description, which proceeds from malonic ester and does not require isolation of intermediates.