C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/516.3
C07C 227/12 (2006.01) C07C 227/24 (2006.01) C07C 229/34 (2006.01) C07C 229/36 (2006.01)
Patent
CA 1292478
2189S/1040A 17268 . TITLE OF THE INVENTION PROCESS FOR L-DOPA ABSTRACT OF THE DISCLOSURE A process for the preparation of (S)- or L-3-(3,4-dihydroxyphenyl)alanine (L-dopa) is described. The process utilizes water as reaction process solvent and proceeds via formation of an intermediate which can be kinetically resolved in a polar solvent to a precursor of the desired isomer and in which the undesired isomer can be efficiently racemized for reuse.
544844
Abramson Newton L.
Reinhold Donald F.
Utne Torleif
Abramson Newton L.
Goudreau Gage Dubuc
Merck & Co. Inc.
Reinhold Donald F.
Utne Torleif
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