Directing Group Enhanced Carbonylative Ring Expansions of Amino-Substituted Cyclopropanes: Rhodium-Catalyzed Multicomponent Synthesis of N-Heterobicyclic Enones
摘要:
Aminocyclopropanes equipped with suitable N-directing groups undergo efficient and regioselective Rh-catalyzed carbonylative C-C bond activation. Trapping of the resultant metallacycles with tethered alkynes provides an atom-economic entry to diverse N-heterobicyclic enones. These studies provide a blueprint for myriad N-heterocyclic methodologies.
Reversible C–C Bond Activation Enables Stereocontrol in Rh-Catalyzed Carbonylative Cycloadditions of Aminocyclopropanes
作者:Megan H. Shaw、Niall G. McCreanor、William G. Whittingham、John F. Bower
DOI:10.1021/ja511335v
日期:2015.1.14
cycloaddition with tethered alkenes to provide stereochemically complex N-heterocyclic scaffolds. These processes rely upon the generation and trapping of rhodacyclopentanone intermediates, which arise by regioselective, Cbz-directed insertion of Rh and CO into one of the two proximal aminocyclopropane C-C bonds. For cyclizations using cationic Rh(I)-systems, synthetic and mechanistic studies indicate that rhodacyclopentanone
在暴露于中性或阳离子 Rh(I)-催化剂体系后,氨基取代的环丙烷与系链烯烃发生羰基化环加成反应,以提供立体化学复杂的 N-杂环支架。这些过程依赖于环戊酮中间体的产生和捕获,其通过区域选择性、Cbz 定向将 Rh 和 CO 插入到两个近端氨基环丙烷 CC 键之一中而产生。对于使用阳离子 Rh(I) 系统的环化,合成和机理研究表明,环戊酮的形成是可逆的,并且烯烃插入步骤决定了产物的非对映选择性。这种机制有助于对烯烃系链上的取代基进行高水平的立体控制。
Carbonylative C−C Bond Activation of Electron-Poor Cyclopropanes: Rhodium-Catalyzed (3+1+2) Cycloadditions of Cyclopropylamides
作者:Andrew G. Dalling、Takayuki Yamauchi、Niall G. McCreanor、Lydia Cox、John F. Bower
DOI:10.1002/anie.201811460
日期:2019.1.2
Rh‐catalyzed carbonylative C−C bond activation of cyclopropylamides generates configurationally stable rhodacyclopentanones that engage tethered alkenes in (3+1+2) cycloadditions. These studies provide the first examples of multicomponent cycloadditions that proceed through C−C bond activation of “simple” electron poor cyclopropanes.
Diastereoselective Photoredox-Catalyzed [3 + 2] Cycloadditions of <i>N</i>-Sulfonyl Cyclopropylamines with Electron-Deficient Olefins
作者:Dawn H. White、Adam Noble、Kevin I. Booker-Milburn、Varinder K. Aggarwal
DOI:10.1021/acs.orglett.1c00711
日期:2021.4.16
A highly diastereoselective, visible-light-induced [3 + 2] cycloaddition between N-sulfonyl cyclopropylamines and electron-deficient olefins is reported. The reactions proceed via the oxidation of a sulfonamide aza-anion by an organic photocatalyst to generate a nitrogen-centered radical. Strain-induced ring opening and intermolecular addition to the olefin generate an intermediate carbon-centered
Opticallyactive 2-alkylcyclopropanecar☐ylic acids were efficiently synthesized from the chiral α-hydroxytrimethylsilanes via a diastereoselective cyclopropanation as the key step.
The present invention provides a compound of formula I;
a method for manufacturing the compounds of the invention, and its therapeutic uses. The present invention further provides a combination of pharmacologically active agents and a pharmaceutical composition.