Anionic [4+2] cycloaddition of furoindolones (e.g., 7 and 10) has been developed as an effective means to the synthesis of carbazoles. This reaction has been shown to be feasible with a wide variety of Michael acceptors to give carbazoles and fused carbazoles in good yields. The scope and limitations of the reaction have been briefly studied. The nature of N-protection of the furoindolones (cf. 7)
We developed a concise protocol for the synthesis of ellipticine quinone from the appropriate 3-iodoindole-2-carbaldehydes in four steps. The key step is the construction of carbazole-1,4-quinone through tandem Ring-Closing Metathesis (RCM) and dehydrogenation under oxygen atmosphere. Therefore, the ellipticine quinone analogs possessing substitution at the 8- and/or 9-positions were synthesized using
A New Synthetic Route to Indoloquinones: Formal Synthesis of Ellipticine
作者:Dipakranjan Mal、Bidyut Senapati、Pallab Pahari
DOI:10.1055/s-2005-864826
日期:——
The anionic [4+2] cycloaddition of furoindolones with arynes and quinol ethers is introduced as an efficient strategy for the synthesis of indoloquinones. The utility of the strategy is exemplified by a very short synthesis of elipticine.
Regioselection Switch in Nucleophilic Addition to Isoquinolinequinones: Mechanism and Origin of the Regioselectivity in the Total Synthesis of Ellipticine
作者:Joaquim A. M. Castro、Bruno K. Serikava、Christian R. S. Maior、Fabrício F. Naciuk、Silvana A. Rocco、Carolina B. P. Ligiéro、Nelson H. Morgon、Paulo C. M. L. Miranda
DOI:10.1021/acs.joc.1c02952
日期:2022.6.17
Ellipticine was synthesized in six steps and 20% global yield starting from the readily available 2,5-dimethoxy isoquinoline. Unprecedented regioselective control of the nucleophilic attack on the isoquinoline-5,8-dione is first described. Investigation of the possible pathways of this transformation through density functional theory calculations reveals unexpected N-oxide assistance in cascade tautomerizations
[EN] SMALL MOLECULES THAT TARGET THE RNA THAT CAUSES ALS<br/>[FR] PETITES MOLÉCULES CIBLANT L'ARN PROVOQUANT LA SLA
申请人:EXPANSION THERAPEUTICS INC
公开号:WO2022055922A1
公开(公告)日:2022-03-17
Disclosed herein are compounds that selectively bind an expanded transcribed repeat r(G4C2)exp, prevent sequestration of RNA-binding proteins, and inhibit translation of repeat associated non-ATG (RAN) translation responsible for generation of toxic dipeptide repeats underlying diseases such as amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). The compounds and their pharmaceutical compositions are useful in treating a disease or condition characterized by an expanded G4C2 repeat RNA (r(G4C2)exp), such as ALS and FTD.