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
Pt-Catalyzed Tandem Epoxide Fragmentation/Pentannulation of Propargylic Esters
作者:Brian G. Pujanauski、B. A. Bhanu Prasad、Richmond Sarpong
DOI:10.1021/ja061549m
日期:2006.5.1
A Pt-catalyzed pentannulation of propargylic esters containing an epoxide moiety has been developed. The present transformation achieves the formation of cyclopentenone products as single diastereomers in good yields. The observed products likely form from pyran intermediates that undergo an oxa-6pi electrocyclic ring opening to a functionalized dienone, followed by ring closure with an accompanying acyl shift.
Analogues of Acifran: Agonists of the High and Low Affinity Niacin Receptors, GPR109a and GPR109b
作者:Jae-Kyu Jung、Benjamin R. Johnson、Tracy Duong、Marc Decaire、Jane Uy、Tawfik Gharbaoui、P. Douglas Boatman、Carleton R. Sage、Ruoping Chen、Jeremy G. Richman、Daniel T. Connolly、Graeme Semple
DOI:10.1021/jm070022x
日期:2007.4.1
Recently identified GPCRs, GPR109a and GPR109b, the high and low affinity receptors for niacin, may represent good targets for the development of HDL elevating drugs for the treatment of atherosclerosis. Acifran, an agonist of both receptors, has been tested in human subjects, yet until recently very few analogs had been reported. We describe a series of acifran analogs prepared using newly developed synthetic pathways and evaluated as agonists for GPR109a and GPR109b, resulting in identification of compounds with improved activity at these receptors.
Santelli,M.; Bertrand,M., Bulletin de la Societe Chimique de France, 1973, p. 2331 - 2335