RACEMIC PREPARATION METHOD FOR CHIRAL BETA-AMINO ACID AND DERIVATIVE THEREOF
摘要:
The present disclosure relates to the field of medicine synthesis, and relates to a method for a racemic preparation of chiral β -amino acids and derivatives thereof, and in particular to a method for racemizing sitagliptin intermediates.

where R 1 is hydrogen, alkyl or aryl; R 2 is hydrogen, alkyl or aryl; R 3 is hydrogen, alkyl, aryl or acyl; R 4 is alkyl, aryl, OR', SR', NHR' or NR'R", wherein R', R" are hydrogen, alkyl or aryl.
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