Trifluoromethanesulfonyl azide as a bifunctional reagent for metal-free azidotrifluoromethylation of unactivated alkenes
作者:Hong-Gui Huang、Weishuang Li、Dayou Zhong、Hu-Chong Wang、Jing Zhao、Wen-Bo Liu
DOI:10.1039/d0sc06473d
日期:——
Vicinal trifluoromethyl azides have widespread applications in organic synthesis and drug development. However, their preparation is generally limited to transition-metal-catalyzed three-component reactions. We report here a simple and metal-free method that rapidly provides these buildingblocks from abundant alkenes and trifluoromethanesulfonyl azide (N3SO2CF3). This unprecedented two-component reaction
邻位三氟甲基叠氮化物在有机合成和药物开发中具有广泛的应用。然而,它们的制备通常限于过渡金属催化的三组分反应。我们在这里报告了一种简单且无金属的方法,该方法可快速从丰富的烯烃和三氟甲磺酰叠氮化物(N 3 SO 2 CF 3)提供这些结构单元。这种前所未有的两组分反应采用了容易获得的N 3 SO 2 CF 3作为双功能试剂,可同时引入CF 3和N 3族避免使用它们昂贵且低原子的经济前体。宽泛的官能团,包括与生物有关的杂环和氨基酸,都可以耐受。该方法的应用通过放大合成(5 mmol),产物衍生化为含CF 3的药用化学图案以及天然产物和药物衍生物的后期修饰而得到进一步证明。
PROCESS FOR PREPARING PYRANO - [2,3-C]PYRIDINE DERIVITAVES
申请人:Sisko Joseph
公开号:US20130116436A1
公开(公告)日:2013-05-09
The present invention relates to a process comprising the step of dehydrating a compound of Formula (I):
with a suitable dehydrating reagent to form a compound of Formula (II):
wherein R
1
-R
7
are as defined herein.
Compounds of Formula (II) have shown promise as intermediates to compounds useful for treating bacterial infections.
Photosensitized Anti-Markovnikov Hydroesterification of Unactivated Alkenes
作者:Tongzhi Sang、Chenxing Zhou、Jun Li、Xincong Liu、Yong Yuan、Xiazhen Bao、Xiaolong Zhao、Congde Huo
DOI:10.1021/acs.orglett.3c01527
日期:2023.6.16
Hydrofunctionalization of alkenes represents a fundamental strategy in synthetic organicchemistry. Herein, we describe a visible-light-promoted approach for the anti-Markovnikov hydrooxygenation of unactivated alkenes. Our protocol features the utilization of a cost-effective, bench-stable, and easy-to-handle oxime ester as the reagent, enabled by energy-transfer catalysis. This methodology exhibits