Multistereocenter-Containing Cyclopentanoids from Ynamides via Oxazolidinone-Controlled Nazarov Cyclization
作者:Narasimhulu Manchala、Hanson Y. L. Law、Daniel J. Kerr、Rohan Volpe、Romain J. Lepage、Jonathan M. White、Elizabeth H. Krenske、Bernard L. Flynn
DOI:10.1021/acs.joc.7b00082
日期:2017.7.7
multistereocenter-containing cyclopentyl rings is an area of great significance to organic synthesis. In this work, we describe a general protocol for accessing multistereocenter-containing cyclopentanoidsfrom simple N-alkynyloxazolidinones (Ox-ynamides). This protocol involves conversion of Ox-ynamides into Ox-activated divinyl and aryl vinyl ketones that undergo facile Nazarov cyclization with excellent
作者:Daniel J. Kerr、Michael Miletic、Jason H. Chaplin、Jonathan M. White、Bernard L. Flynn
DOI:10.1021/ol300316a
日期:2012.4.6
Oxazolidinones are powerful promoters of the Nazarov reaction, enabling the cyclization of conventionally resistant substrates to be achieved under mild conditions. They exert excellent regio- and torquoselectivecontrol in both the conventional Nazarov reaction giving cyclopentenones and in the “interrupted” Nazarov reaction, giving more highly substituted multistereocenter containing products.
selective inhibitors of this channel are known in the literature. In this work, we report the discovery of a new series of aryl and acylsulfonamides as state-dependent inhibitors of Nav1.3 channels. Using a ligand-based 3D similarity search and subsequent hit optimization, we identified and prepared a series of 47 novel compounds and tested them on Nav1.3, Nav1.5, and a selected subset also on Nav1.7 channels
电压门控钠通道(Na v s)在神经传递中发挥着重要作用,其功能障碍往往是各种神经系统疾病的原因。Na v 1.3亚型存在于中枢神经系统中,并在外周损伤后上调,但其在人体生理学中的作用尚未完全阐明。报告表明,选择性 Na v 1.3 抑制剂可用作治疗疼痛或神经发育障碍的新疗法。文献中很少有该通道的选择性抑制剂。在这项工作中,我们报告了一系列新的芳基和酰基磺酰胺作为 Na v 1.3 通道状态依赖性抑制剂的发现。使用基于配体的 3D 相似性搜索和随后的命中优化,我们鉴定并制备了一系列 47 种新型化合物,并在QPatch 补丁中的Na v 1.3、Na v 1.5 和 Na v 1.7 通道上测试了它们 -钳夹电生理学测定。八种化合物针对 Na v 1.3 通道失活状态的IC 50值小于 1 μM ,其中一种化合物的 IC 50值为 20 nM,而针对 Na v 1.5 通道和 Na v 1
A Reductive-Coupling plus Nazarov Cyclization Sequence in the Asymmetric Synthesis of Five-Membered Carbocycles
作者:Daniel J. Kerr、Jonathan M. White、Bernard L. Flynn
DOI:10.1021/jo100736p
日期:2010.11.5
Palladium-mediated hydrostannylation of alkynoyl compounds is combined with Stille-Scott cross-coupling (reductive-coupling) to give one-pot access to divinyl and aryl vinyl ketones, which undergo Nazarov cyclization to give cyclopentenones upon treatment with acid. This reaction sequence has been studied with a variety of different substitution patterns, including the use of oxazolidinone auxiliaries to achieve torquoselectivity in the Nazarov cyclization. Through a combination of good yields and moderate to good levels of stereochemical induction, this approach affords efficient, convergent, and asymmetric access to a variety of different cyclopentanoid systems.
Chang; Biftu; Boulton, European Journal of Medicinal Chemistry, 1986, vol. 21, # 5, p. 363 - 369