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Design of Pyrazolo-pyrrolo-pyrazines and Pyrazolo-pyrrolo-diazepines via AuCl3-Catalyzed and NaH-Supported Cyclization of N-Propargyl Pyrazoles
Date
2015-04-17
Author
Basceken, Sinan
Balcı, Metin
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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A concise synthetic methodology for new heterocyclic scaffolds, such as pyrazolo-pyrrolo-pyrazine and pyrazolo-pyrrolo-diazepine skeletons, was developed. The key features of this method include (i) synthesis of pyrrole-derived alpha,beta-alkynyl ketones, (ii) introduction of various substituents into the alkyne functionality by Sonogashira cross-coupling, (iii) synthesis of pyrazole units by the reaction of alpha,beta-alkynyl compounds with hydrazine monohydrate, (iv) gold-catalyzed cyclization of pyrazoles with alkyne units, and (v) cyclization with NaH. Furthermore, this methodology allows various substituents to be introduced into all positions of the target compounds.
Subject Keywords
GOLD-CATALYZED CYCLIZATION
,
RING-SYSTEMS DIAZINES
,
REGIOSELECTIVE SYNTHESIS
,
ALKYNES
,
HYDROAMINATION
,
FUNCTIONALIZATION
,
TRANSANNULATION
,
DERIVATIVES
,
HYDRAZONES
,
NITROGEN
URI
https://hdl.handle.net/11511/51297
Journal
JOURNAL OF ORGANIC CHEMISTRY
DOI
https://doi.org/10.1021/acs.joc.5b00034
Collections
Graduate School of Natural and Applied Sciences, Article