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Synthesis of Pyrrole-Fused C,N-Cyclic Azomethine Imines and Pyrazolopyrrolopyrazines: Analysis of Their Aromaticity Using Nucleus-Independent Chemical Shifts Values
Date
2016-02-05
Author
Ozer, Merve Sinem
Menges, Nurettin
Keskin, Selbi
ŞAHİN, Ertan
Balcı, Metin
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The AgOTf-catalyzed reaction of C-2 substituted pyrrole hydrazones having an N-propargyl group was studied. The selective 6-endo-dig mode of cyclization was observed, giving rise to the formation of pyrrole-fused C,N-cyclic azomethine imine derivatives. The reaction of one azomethine imine derivative with various dipolarophiles resulted in the formation of cycloadducts having a pyrazolopyrrolopyrazine skeleton. The aromaticity of C,N-cyclic azomethine imines as well as that of pyrazolopyrrolopyrazines was determined by calculating of nucleus-independent chemical shifts values.
Subject Keywords
Physical and Theoretical Chemistry
,
Organic Chemistry
,
Biochemistry
URI
https://hdl.handle.net/11511/51312
Journal
ORGANIC LETTERS
DOI
https://doi.org/10.1021/acs.orglett.5b03434
Collections
Graduate School of Natural and Applied Sciences, Article