Efficient Synthesis of 3,4-Disubstituted 7-Azaindoles Employing SEM as a Dual Protecting–Activating Group
作者:Piroska Gyárfás、János Gerencsér、Warren S. Wade、László Ürögdi、Zoltán Novák、S. Todd Meyer
DOI:10.1055/s-0039-1690735
日期:2019.12
An efficient method for nucleophilic aromatic substitution on 7-azaindoles has been developed. The reaction is facilitated by the unique dual influence of SEM as both protecting and activating group, permitting mild conditions and short reaction times that are compatible with sensitive functional groups. The method is suitable for the synthesis of a broad range of products, most notably ethers.
There are described compounds of formula (I): and there use as a medicament in the treatment of conditions involving abnormal activation and/or malfunction of the of the hedgehog pathway, such as cancer, fibrosis and chronic graft-versus-host disease (cGVHD).
Synthesis of Differentially Protected Azatryptophan Analogs via Pd<sub>2</sub>(dba)<sub>3</sub>/XPhos Catalyzed Negishi Coupling of <i>N</i>-Ts Azaindole Halides with Zinc Derivative from Fmoc-Protected <i>tert</i>-Butyl (<i>R</i>)-2-Amino-3-iodopropanoate
作者:Roshan Y Nimje、Devaiah Vytla、Prakasam Kuppusamy、Rajeswari Velayuthaperumal、Lokesh Babu Jarugu、China Anki Reddy、Nanjundaswamy Kanikahalli Chikkananjaiah、Richard A. Rampulla、Cullen L. Cavallaro、Jianqing Li、Arvind Mathur、Anuradha Gupta、Amrita Roy
DOI:10.1021/acs.joc.0c00973
日期:2020.9.4
Unnatural amino acids play an important role in peptide based drug discovery. Herein, we report a class of differentially protected azatryptophan derivatives synthesized from N-tosyl-3-haloazaindoles 1 and Fmoc-protected tert-butyl iodoalanine 2 via a Negishi coupling. Through ligand screening, Pd-2(dba)(3)/XPhos was found to be a superior catalyst for the coupling of 1 with the zinc derivative of 2 to give tert-butyl (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)propanoate derivatives 3 in 69-91% isolated yields. In addition, we have demonstrated that the protecting groups, namely, Ts, Fmoc, and Bu-t, can be easily removed selectively.
[EN] AZAINDOLE CARBOXAMIDE COMPOUNDS FOR THE TREATMENT OF MYCOBACTERIAL INFECTIONS<br/>[FR] COMPOSÉS D'AZAINDOLE CARBOXAMIDE POUR LE TRAITEMENT D'INFECTIONS MYCOBACTÉRIENNES
申请人:THE GLOBAL ALLIANCE FOR TB DRUG DEV INC
公开号:WO2021062316A1
公开(公告)日:2021-04-01
Provided herein are compounds of Formula (I) and Formula (II): as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of tuberculosis.