Reaction of acetylenic hydrocarbons with α,β-unsaturated ketones in tetrahydrofuran in the presence of lithium naphthalene
作者:Kyoichi Suga、Shoji Watanabe、Toshimitsu Suzuki
DOI:10.1139/v68-504
日期:1968.10.1
Lithium naphthalene reacts easily with terminal acetylenic hydrocarbons, such as acetylene, methyl-acetylene, or phenylacetylene, to give the corresponding lithium compounds quantitatively. The rea...
萘锂容易与乙炔、甲基乙炔或苯乙炔等末端炔烃反应,定量生成相应的锂化合物。实际...
Ruthenium-Catalyzed Synthesis of Highly Substituted Pyrroles from 1-Vinylpropargyl Alcohols and Amines
作者:Nora Thies、Martin Gerlach、Edgar Haak
DOI:10.1002/ejoc.201300803
日期:2013.11
Ruthenium-catalyzed atom-economic transformations of 1-vinylpropargyl alcohols with amines leading to highlysubstituted pyrroles in a one-pot cascade process are reported. The allylation/cycloisomerization sequence is catalyzed by a single ruthenium(0) complex that contains a redox-coupled dienone ligand and can be extended by an additional [3,3] rearrangement. The environmentally benign reactions
Complementary Iron(II)‐Catalyzed Oxidative Transformations of Allenes with Different Oxidants
作者:Venkata R. Sabbasani、Hyunjin Lee、Yuanzhi Xia、Daesung Lee
DOI:10.1002/anie.201510006
日期:2016.1.18
Substituent‐ and oxidant‐dependent transformations of allenes are described. Given the profound influence of the substituent on the reactivity of allenes, the subtle differences in allene structures are manifested in the formation of diverse products when reacted with different electrophiles/oxidants. In general, reactions of nonsilylated allenes involve an allylic cation intermediate by forming a
Ruthenium-Catalyzed Cascade Annulation of Indole with Propargyl Alcohols
作者:Julia Kaufmann、Elisabeth Jäckel、Edgar Haak
DOI:10.1002/anie.201801846
日期:2018.5.14
Cascade transformations forming multiple bonds and one‐pot procedures provide rapid access to natural‐product‐like scaffolds from simple precursors. These atom‐economic processes are valuable tools in organic synthesis and drug discovery. Herein, we report on ruthenium‐catalyzed cascade annulations of indole with readily available propargylalcohols. These provide rapid access to diverse carbazoles
形成多个键和一锅法的级联转化提供了从简单前体中快速获得天然产物样支架的途径。这些原子经济过程是有机合成和药物发现中的宝贵工具。本文中,我们报道了钌与容易获得的炔丙醇的级联环空反应。这些提供了快速接近各种咔唑,环庚[ b ]吲哚和其他具有高选择性的稠合多环的途径。具有氧化还原偶联的环戊二烯酮配体的双功能钌配合物可作为不同级联过程的常用催化剂。
Ruthenium-Catalyzed Functionalization of Pyrroles and Indoles with Propargyl Alcohols
作者:Nora Thies、Cristian G. Hrib、Edgar Haak
DOI:10.1002/chem.201200188
日期:2012.5.14
Several ruthenium‐catalyzed atom‐economic transformations of propargylalcohols with pyrroles or indoles leading to alkylated, propargylated, or annulated heteroaromatics are reported. The mechanistically distinct reactions are catalyzed by a single ruthenium(0) complex containing a redox‐coupled dienone ligand. The mode of activation regarding the propargylalcohols determines the reaction pathway