Stereoselective Desymmetrization of 2,2-Bishydroxymethyl-1-tetralones by Iodocyclization, Synthesis of Novel Enantiopure [6.6.5] Tricyclic Framework and Chemoenzymatic Diversity Generation
作者:Tridib Mahapatra、Navendu Jana、Samik Nanda
DOI:10.1002/adsc.201100088
日期:2011.8
Stereoselective halocyclization of pro-chiral 2,2-bishydroxymethyl-1-tetralone derivatives with N-halosuccinamides afforded an interesting tricyclic scaffold found in many naturally occurring hasubanan alkaloids. Enantiopure tricyclic scaffolds are synthesized by using enzymatic kinetic resolution (EKR) of the parent racemic compound. Microbial ketoreductase (Geotrichum candidum, Aspergillus niger
前手性2,2-双羟甲基-1-四氢萘酮衍生物与N-卤代琥珀酰胺的立体选择性卤环化作用提供了一种有趣的三环骨架,存在于许多天然存在的hasubanan生物碱中。通过使用母体外消旋化合物的酶促动力学拆分(EKR)合成对映体纯的三环支架。微生物酮还原酶(白地霉,黑曲霉和近平滑念珠菌)介导的立体选择性还原反应已经成功地用于这些对映体纯的三环支架其中,随后官能团操作,提供了新的环状框架。