具有立体生成硫原子的手性亚砜亚胺是药物发现中很有希望的主题。我们报告了一种有效的方法,通过基于C H H官能化的动力学拆分来访问手性亚砜肟。配备了手性Cp x配体的铑(III)络合物选择性地与邻苯二甲酰苯丙氨酸一起参与仅两个磺胺嘧啶对映体之一的CH活化。中间体可与各种重氮化合物反应,从而获得具有合成上有价值的取代模式的手性1,2-苯并噻嗪。以高产率和对映选择性优良,获得两个亚磺酰亚胺和1,2-苯并噻嗪,与小号值最高可达200。该方法的实用性通过两种药理相关激酶抑制剂的关键中间体的合成得以说明。
具有立体生成硫原子的手性亚砜亚胺是药物发现中很有希望的主题。我们报告了一种有效的方法,通过基于C H H官能化的动力学拆分来访问手性亚砜肟。配备了手性Cp x配体的铑(III)络合物选择性地与邻苯二甲酰苯丙氨酸一起参与仅两个磺胺嘧啶对映体之一的CH活化。中间体可与各种重氮化合物反应,从而获得具有合成上有价值的取代模式的手性1,2-苯并噻嗪。以高产率和对映选择性优良,获得两个亚磺酰亚胺和1,2-苯并噻嗪,与小号值最高可达200。该方法的实用性通过两种药理相关激酶抑制剂的关键中间体的合成得以说明。
An efficient kineticresolution of sulfoximines with enals was realized using chiral N-heterocyclic carbene (NHC) catalysts. The stereoselective amidation proceeds without additional acyl transfer agent. Both enantiomers of the sulfoximines can be obtained with excellent ee values (up to 99% ee and -97% ee, respectively). Performing the catalysis on a gram scale allowed using the recovered sulfoximine
使用手性 N-杂环卡宾 (NHC) 催化剂实现了亚砜亚胺与烯醛的有效动力学拆分。立体选择性酰胺化无需额外的酰基转移剂即可进行。可以获得具有优异 ee 值的亚砜亚胺的两种对映异构体(分别高达 99% ee 和 -97% ee)。在 FXa 抑制剂 F 的不对称合成中使用回收的亚砜亚胺 (+)-1j 进行克级催化。
Iron-Catalyzed Asymmetric Imidation of Sulfides via Sterically Biased Nitrene Transfer
molecules and synthesis of the chiral insecticide sulfoxaflor and the intermediates of related bioactive compounds. Based on experimentalstudies and theoretical calculations, a water-bonded high-spin iron nitrenoid species was identified as the key intermediate. The observed stereoselectivity was original from the steric repulsion between the amide unit of the ligand in the chiral cave and the bulky substituent
过渡金属催化的对映选择性氮宾转移到硫化物已成为快速构建对映体富集的硫酰亚胺的最有力的策略之一。然而,与贵金属相比,实现对地球丰富的高活性过渡金属氮烯中间体的立体控制仍然是一个艰巨的挑战。在此,我们公开了使用亚氨基碘烷作为氮宾前体的手性铁(II)/ N , N'-二氧化物催化的二烷基硫醚和烷基芳基硫醚的对映选择性酰亚胺化。以中等至良好的收率和高对映选择性获得了一系列手性磺酰亚胺(56 个实例,收率高达 99%,98:2 er)。通过复杂分子的后期修饰以及手性杀虫剂氟啶虫胺和相关生物活性化合物中间体的合成,证明了该方法的实用性。基于实验研究和理论计算,水键合的高自旋铁氮化物被确定为关键中间体。观察到的立体选择性源于手性洞穴中配体的酰胺单元与硫化物的大取代基之间的空间排斥。此外,二恶唑酮被证明是在铁(III)/ N , N'-二氧化物络合物存在下合适的酰基氮烯前体,导致形成对映选择性反转的硫酰亚
Sulfoximine-substituted trifluoromethylpyrimidine analogs as inhibitors of proline-rich tyrosine kinase 2 (PYK2) show reduced hERG activity
作者:Daniel P. Walker、Michael P. Zawistoski、Molly A. McGlynn、Jian-Cheng Li、Daniel W. Kung、Peter C. Bonnette、Amy Baumann、Leonard Buckbinder、Janet A. Houser、Jason Boer、Anil Mistry、Seungil Han、Li Xing and Angel Guzman-Perez
DOI:10.1016/j.bmcl.2009.04.093
日期:2009.6
The synthesis, in vitro properties, and in vivo pharmacokinetics for a series of sulfoximine-substituted trifluoromethylpyrimidines as inhibitors of proline-rich tyrosine kinase, a target for the possible treatment of osteoporosis, are described. These compounds were prepared as surrogates of the corresponding sulfone compound 1. Sulfone 1 was an attractive PYK2 lead compound; however, subsequent studies determined this compound possessed high dofetilide binding, which is an early indicator of cardiovascular safety. Surprisingly, the corresponding sulfoximine analogs displayed significantly lower dofetilide binding, which, for N-methylsulfoximine (S)-14a, translated to lower activity in a patch clamp hERG K+ ion channel screen. In addition, compound (S)-14a shows good oral exposure in a rat pharmacokinetic model. (C) 2009 Elsevier Ltd. All rights reserved.