Magnesium → HCID 178488035, compound

Participants

Reaction Steps

One specific variant of this aspect of the invention involves dissolving magnesium at a temperature of 30° C. to 60° C. in a straight or branched lower alkanol (one to four carbons) solvent, adding haloalkane (one to three carbons) solvent, cooling to 0° C. to 15° C., adding esomeprazole base in a straight or branched lower alkanol solvent to generate a reaction mass, decomposing the reaction mass by pouring the mass into water and stirring for one to two hours, filtering out the resulting solid by conventional methods, suspending the solid obtained by filtering in a solvent such as acetone and stirring for one to two hours, filtering out the solid from the suspension by conventional methods (to remove excess magnesium), dissolving the solid resulting from the filtering in a straight or branched lower alkanol solvent and filtering the solution a straight or branched lower alkanol solvent, distilling off the solvent from the filtrate under reduced pressure, suspending the resulting solid in a solvent such as ethyl acetate (to crystallize solid), then either filtering by conventional methods; or adding esomeprazole magnesium in the form of an amorphous solid as seeding material and cooling to a temperature of 0° C. to 20° C. and then filtering by conventional methods, and drying the resulting solid at a temperature of 30° C. to 100° C., preferably 60° C., to obtain a hydrate of esomeprazole magnesium in the form of an amorphous solid.

Provenance & Evidence