摘要:
A process for the manufacturing of levetiracetam, wherein said process comprises the steps of: (1) reacting the (-)-(S)-alpha-ethyl-2-oxo-1-pyrrolidine acetic acid with a substoichiometric amount of an activating agent in an alcoholic solvent, and (2) subjecting the resulting reaction solution of step (1) to an ammonolysis process with gaseous ammonia.
摘要:
The present invention relates to a process for the cyclopropanation with ethylene carbonate or ethylene sulfate of a compound of formula (II):
wherein G is -CN or -COOR in which R is a C 1 -C 4 straight or branched alkyl X and Y are independently selected from the group consisting of hydrogen, fluorine, chlorine, bromine, iodine, R 1 O- and R 1 S- wherein R 1 is C1-C4 straight or branched alkyl chain.
摘要:
The present invention relates to a process for preparing a ketosulfone derivative and, more particularly, to an improved method for synthesising 1-(6-methylpyridin-3-yl)-2-[(4-methylsulfonyl)-phenyl]-ethanone by means of Pd-catalysed alpha arylation process of a heteroaromatic ketone derivative.