Highly Regioselective Synthesis of Substituted Pyrroles Utilizing Low-Valent Titanium Reagent
作者:Daqing Shi、Guolan Dou、Chunling Shi、Zhengyi Li、Shun-Jun Ji
DOI:10.1055/s-2007-990787
日期:2007.10
A short and efficientsynthesis of substituted pyrroles was accomplished in good yields via the novel coupling cyclization reaction of 1,3-diketones with imines promoted by low-valenttitaniumreagent. High regioselectivity was achieved and the structures of two of the products were confirmed by X-ray diffraction studies.
通过低价钛试剂促进的 1,3-二酮与亚胺的新型偶联环化反应,以良好的收率完成了取代吡咯的短而有效的合成。实现了高区域选择性,并且通过 X 射线衍射研究证实了两种产物的结构。
Beyond Bioisosteres: Divergent Synthesis of Azabicyclohexanes and Cyclobutenyl Amines from Bicyclobutanes**
作者:Kushal Dhake、Kyla J. Woelk、Joseph Becica、Andy Un、Sarah E. Jenny、David C. Leitch
DOI:10.1002/anie.202204719
日期:2022.7.4
By exploiting the divergent reactivity of bicyclobutanes undergoing addition to imines, highly-functionalized and stereochemically-defined azabicyclohexanes and cyclobutenyl amines are easily accessible. These modular syntheses provide new and selective methods to prepare Csp3-rich scaffolds with potential beyond bioisosteric replacements in medicinal chemistry.
通过利用双环丁烷与亚胺加成的不同反应性,可以很容易地获得高度官能化和立体化学定义的氮杂双环己烷和环丁烯胺。这些模块化合成提供了新的和选择性的方法来制备富含 C sp 3的支架,在药物化学中具有超越生物等排替代物的潜力。