Synthesis and determination of absolute configuration of a non-peptidic α<sub>v</sub>β<sub>6</sub> integrin antagonist for the treatment of idiopathic pulmonary fibrosis
作者:Niall A. Anderson、Ian B. Campbell、Brendan J. Fallon、Sean M. Lynn、Simon J. F. Macdonald、John M. Pritchard、Panayiotis A. Procopiou、Steven L. Sollis、Lee R. Thorp
DOI:10.1039/c6ob00496b
日期:——
yield of the seven linear step synthesis was 8% and the product was obtained in >99.5% ee proceeding with 80% de. The absolute configuration of 1 was established by an alternative asymmetric synthesis involving alkylation of an arylacetic acid using Evans oxazolidinone chemistry, acylation using the resulting 2-arylsuccinic acid, and reduction. The absolute configuration of the benzylic asymmetric centre
(S)-3-(3-(3-(3,5-二甲基-1 H-吡唑-1-基)苯基)-4-((R)-3-(2-(5,6,7) ,1,8-四氢-1,8-萘啶-2-基)乙基吡咯烷-1-基)丁酸(1),这是一种治疗特发性肺纤维化的潜在治疗剂,目前正处于I期临床试验中报告。合成的关键步骤包括将2-甲基萘吡啶与(R)-N -Boc-3-(碘甲基)-吡咯烷烷基化,以及不对称Rh催化的芳基硼酸加成到4-(N-吡咯烷基)巴豆酸酯。七个线性步骤合成的总产率为8%,并且在> 99.5%ee和80%de的条件下获得了产物。的绝对构型1由一个替代不对称合成涉及使用伊文思恶唑烷酮化学,酰化使用所得2- arylsuccinic酸和还原芳基乙酸的烷基化建立。苄基不对称中心的绝对构型被确定为(S)。