Practical Asymmetric Synthesis of a Non-Peptidic α<sub>v</sub>β<sub>3</sub> Antagonist
作者:Stephen P. Keen、Cameron J. Cowden、Brian C. Bishop、Karel M. J. Brands、Antony J. Davies、Ulf H. Dolling、David R. Lieberman、Gavin W. Stewart
DOI:10.1021/jo048082n
日期:2005.3.1
development of a practical and highly convergent synthesis of an αvβ3 antagonist is described. The two key fragments present in this compound, a tetrahydropyrido[2,3-b]azepine ring system and a chiral 3-aryl-5-oxopentanoic acid, were constructed independently and then coupled at a late stage using a Wittig reaction. The pyridoazepine moiety was prepared from N-Boc 6-chloro-2-aminopyridine via directed
的α的一个实际和高度会聚合成的发展v β 3拮抗剂进行说明。该化合物中存在的两个关键片段,一个四氢吡啶并[2,3- b ]氮杂ring环体系和一个手性的3-芳基-5-氧代戊酸,是独立构建的,然后在后期使用Wittig反应偶联。由N -Boc 6-氯-2-氨基吡啶经定向邻位制备吡啶并ze庚因部分-金属化/烷基化,然后原位环化。然后使用Suzuki反应连接Wittig偶联所需的丙醛侧链。偶联配偶体是由3-取代的戊二酸酐的不对称甲醇水解,然后将酸部分精制为必需的β-酮磷烷制备的。使用该途径,制备了千克量的所需候选药物。