A Unified Approach to the Isomeric α-, β-, γ-, and δ-Carbolines via their 6,7,8,9-Tetrahydro Counterparts
摘要:
A cross-coupling/reductive cyclization protocol has been employed in a unified approach to all four carbolines. So, for example, the 2-nitropyridine 8, which is readily prepared through an efficient palladium-catalyzed Ullmann cross-coupling reaction, is reductively cyclized under conventional conditions to give 6,7,8,9-tetrahydro-alpha-carboline that is itself readily aromatized to give alpha-carboline (1).
The present invention provides compounds, compositions thereof, and methods of using the same for the inhibition of CRBN, and the treatment of CRBN-mediated disorders.
本发明提供了化合物、其组合物以及使用这些化合物抑制CRBN和治疗CRBN介导的疾病的方法。
Iron‐Catalyzed Radical Activation Mechanism for Denitrogenative Rearrangement Over C(sp
<sup>3</sup>
)–H Amination
An iron‐catalyzed denitrogenative rearrangement of 1,2,3,4‐tetrazole is developed over the competitive C(sp3)–H amination. This catalytic rearrangement reaction follows an unprecedented metalloradical activation mechanism. Employing the developed method, a wide number of complex‐N‐heterocyclic product classes have been accessed. The synthetic utility of this radical activation method is showcased with
Site-Selective Functionalization of 7-Azaindoles via Carbene Transfer and Isolation of <i>N</i>-Aromatic Zwitterions
作者:Junheng Liu、Guangyang Xu、Shengbiao Tang、Qun Chen、Jiangtao Sun
DOI:10.1021/acs.orglett.0c03653
日期:2020.12.4
metal-carbene transfer reaction of 7-azaindoles has been conducted, and the unprecedented dearomative N7-alkylation reaction has been accomplished via ruthenium catalysis. Importantly, through a sequential dearomatization–aromatization process, an isolable, and new class of azaindole-based N-aromatic zwitterions has been discovered from the reaction of 7-azaindoles and diazoesters.
Palladium-Catalyzed One-Pot Synthesis of Pyrrole-Annulated Coumarin, Quinolone, and 7-Aza-indole Derivatives
作者:K. Majumdar、Sintu Ganai、Buddhadeb Chattopadhyay、Krishanu Ray
DOI:10.1055/s-0030-1260312
日期:2011.10
An efficient one-pot approach for the synthesis of highly substituted pyrrolocoumarin, quinolone, and pyrrolopyridine derivatives has been achieved by palladium acetate catalyzed reaction in DMF through initially formed enamine from cyclic and acyclic ketones and 6-amino-5-bromocoumarin, 6-amino-5-bromo-1-methyl quinolone, and 2-amino-3,5-dibromopyridine, respectively.
Cycloalcanoindole and -azaindole derivatives are prepared by reaction of appropriately substituted carboxylic acids with anmines. The cycloahloanindole and -azaindole derivatives are suitable as active compounds for medicaments, preferably antiatherosclerotic medicaments.