N-Acetyl-l-phenylalanine Racemization during TBTU Amidation: An In-Depth Study for the Synthesis of Anti-Inflammatory 2-(N-Acetyl)-l-phenylalanylamido-2-deoxy-d-glucose (NAPA)
作者:Elisa Sturabotti、Fabrizio Vetica、Giorgia Toscano、Andrea Calcaterra、Andrea Martinelli、Luisa Maria Migneco、Francesca Leonelli
DOI:10.3390/molecules28020581
日期:——
A thorough study on the amidation conditions of N-acetyl-l-phenylalanine using TBTU and various bases is reported for the synthesis of 2-(N-acetyl)-l-phenylalanylamido-2-deoxy-d-glucose (NAPA), a promising drug for the treatment of joints diseases. TBTU-mediated diastereoselective amidation reaction with 1,3,4,6-tetra-O-acetyl-β-d-glucosamine always gave racemization of N-acetyl-l-phenylalanine. The
据报道,使用 TBTU 和各种碱对 N-乙酰-l-苯丙氨酸的酰胺化条件进行了全面研究,以合成 2-(N-乙酰基)-l-苯丙氨酰氨基-2-脱氧-d-葡萄糖 (NAPA),一种用于治疗关节疾病的有前途的药物。TBTU 介导的与 1,3,4,6-四-O-乙酰基-β-d-葡糖胺的非对映选择性酰胺化反应总是产生 N-乙酰基-1-苯丙氨酸的外消旋化。在存在不同碱基的情况下并通过其他对照实验详细研究了酰胺化条件下的立体化学保留,证明了使用吡啶作为碱基减少外消旋化的可能性。