Direct one-pot synthesis of terminal olefins and deuterio olefins from carboxylic acid chlorides
作者:Jose Barluenga、Miguel Yus、Jose M. Concellon、Pablo Bernad
DOI:10.1021/jo00166a041
日期:1983.9
One-pot and regioselective synthesis of alkenes and deuterioalkenes from .alpha.-chlorocarboxylic acid chlorides via a tandem addition of two different nucleophiles (Grignard reagents, hydride or deuteride) and further lithiation
作者:Jose Barluenga、Miguel Yus、Jose M. Concellon、Pablo Bernad
DOI:10.1021/jo00152a042
日期:1983.2
BARLUENGA, J.;YUS, M.;CONCELLON, M.;BERNAD, P., J. ORG. CHEM., 1983, 48, N 4, 609-611
作者:BARLUENGA, J.、YUS, M.、CONCELLON, M.、BERNAD, P.
DOI:——
日期:——
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。
Dihydropyridines in Organometallic Synthesis. Formation of Pyridine and Dihydropyridine-Stabilized Alkylidene Complexes of Tungsten(0) and Chromium(0) from Fischer Carbene Complexes: Structure and Reactivity
1,2- and 1,4-dihydropyridines react with alkoxycarbene complexes of chromium and tungsten to give, upon an unprecedented hydride transfer, alcohol elimination, and pyridine fixation on the carbene carbon, a new class of air-stable pyridinium ylide complexes. These pyridine-protected alkylidene complexes of chromium(0) and tungsten(0) were fully characterized by X-ray crystallography. In the case of