work reports a metal-free method for deuteriumlabeling covering a broad range of substrate including phenolic compounds (i.e. flavonoids and stilbenes), indoles, pyrroles, carbonyl compounds, and steroids. This method was also applied for commonly used drugs such as loxoprofen, haloperidol, stanolone, progesterone, androstenedione, donepezil, ketorolac, adrenosterone, cortisone, pregnenolone, and dexamethasone
在这里,我们揭示了一种简单的卤化氘 (DX) 生成方法,该方法由合成化学实验室中现成的普通且廉价的试剂制成,i . e . 在温和条件下,异戊二烯基、烯丙基和炔丙基卤化物。我们设想,原位生成酸卤化氘可用于酸催化反应,并可用于有机催化氘化。本工作报告了一种无金属氘标记方法,覆盖范围广泛的底物,包括酚类化合物(即. 类黄酮和芪)、吲哚、吡咯、羰基化合物和类固醇。该方法也适用于常用药物,如洛索洛芬、氟哌啶醇、甾烷酮、黄体酮、雄烯二酮、多奈哌齐、酮咯酸、肾上腺素、可的松、孕烯醇酮和地塞米松。这项工作证明了一些氘代化合物的克级无色谱合成。这项工作提供了一种简单、清洁且无副产物的位点选择性氘代,并且氘代产物无需色谱分离即可获得。当将这些引发剂用于其他酸催化反应时,DX 的氘同位素效应可能会提供不同于使用普通酸的反应所获得的产物。虽然异戊二烯卤化物自发转化为酸的机制尚不清楚,
Highly Enantioselective Synthesis of Indolines: Asymmetric Hydrogenation at Ambient Temperature and Pressure with Cationic Ruthenium Diamine Catalysts
作者:Zhusheng Yang、Fei Chen、Yanmei He、Nianfa Yang、Qing-Hua Fan
DOI:10.1002/anie.201607890
日期:2016.10.24
asymmetric hydrogenation of 1H‐indoles and 3H‐indoles at ambient temperature and pressure, catalyzed by chiral phosphine‐free cationic ruthenium complexes, has been developed. Excellent enantio‐ and diastereoselectivities (up to >99 % ee, >20:1 d.r.) were obtained for a wide range of indolederivatives, including unprotected 2‐substituted and 2,3‐disubstituted 1H‐indoles, as well as 2‐alkyl‐ and 2‐aryl‐substituted
Selective Ru(0)-Catalyzed Deuteration of Electron-Rich and Electron-Poor Nitrogen-Containing Heterocycles
作者:Birgit Gröll、Michael Schnürch、Marko D. Mihovilovic
DOI:10.1021/jo300219v
日期:2012.5.4
A highly selective Ru3(CO)12-catalyzed deuteration method using t-BuOD as deuterium source is reported. Electron-rich and electron-poor N-heteroarenes such as indoles, azaindoles, deazapurines, benzimidazole, quinolines, isoquinolines, and pyridines were efficiently deuterated at specific positions with high selectivity; in most cases, deuterium incorporation was close to the theoretically possible
A silver Lewis acid catalyzes dearomative [2π+2σ] cycloadditions of N-unprotected indoles and bicyclobutanes to afford indoline fused bicyclo[2.1.1]hexanes (BCHs) bearing up to four contiguous quaternary carbon centers in high yields and with an opposite regioselectivity compared to the classical pathway.