<i>N</i>-Methyl-<scp>d</scp>-aspartic Acid Receptor Agonists: Resolution, Absolute Stereochemistry, and Pharmacology of the Enantiomers of 2-Amino-2-(3-hydroxy-5-methyl-4-isoxazolyl)acetic Acid
作者:Ulf Madsen、Karla Frydenvang、Bjarke Ebert、Tommy N. Johansen、Lotte Brehm、Povl Krogsgaard-Larsen
DOI:10.1021/jm950393q
日期:1996.1.1
and (2S)-2-[3-(benzyloxy)-5-methyl-4-isoxazolyl]N-tert-butyl-2- [N-[(S)-1-phenylethyl]benzamido]-acetamide (16 and 17, respectively) were synthesized and separated chromatographically. The absolutestereochemistry of 16 was confirmed by an X-ray analysis. Deprotection of these intermediates did, however, provide (R)- (8) and (S)- (9) AMAA, respectively, in extensively racemized forms. N-BOC-protected