Aromatic β-amino acid esters 2a-h were prepared in racemic and enantiomerically pure form by the Radionow reaction or based on the method described by Davis and used as mimics of the Asp-Phg C-terminus in LDV derived VLA-4 antagonists. As a promising β-amino acid ester, 11 was identified and used for the synthesis of the highly potent VLA-4 antagonist S9059 with an IC50 of 1.6 nM in a cell attachment assay.
芳香性 β-
氨基酸酯 2a-h 通过 Radionow 反应或基于 Davis 描述的方法制备成外消旋形式和手性纯形式,并作为模拟 LDV 衍生的 V
LA-4 拮抗剂中的 Asp-Phg C 末端。作为一种有前景的 β-
氨基酸酯,11 被鉴定并用以合成高效力的 V
LA-4 拮抗剂 S9059,其在细胞粘附试验中的 IC50 值为 1.6 nM。