Výsledky vyhledávání - "Kai Hillrichs"

Pyrazoles in the Intersection of Mesomeric Betaines and N-Heterocyclic Carbenes: Formation of NHC Selenium Adducts of Pyrazolium-4-aminides

Autor: Andreas Schmidt, Kai Hillrichs, Jan C. Namyslo, Felix Lederle, Eike G. Hübner

Starting from 4-nitropyrazole, eight mesoionic pyrazolium-4-aminides were prepared by a six-step reaction sequence. The deprotonation of 1,2-disubstituted 4-amido-1H-pyrazolium salts by an anion exchange resin in its hydroxide form is the final step

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aaae39d4e33a88002f34c1bee1d2f982
https://publica.fraunhofer.de/handle/publica/429390

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Deprotonation of 4-Ethynylpyrazolium Salts

Autor: Jan C. Namyslo, Kai Hillrichs, Olivia Doppleb, Nils L. Ahlburg, Andreas Schmidt, Eike G. Hübner

Publikováno v: HETEROCYCLES. 96:1203

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::17eb8f9bb9292ef2abf2fb165d9bbad8
https://doi.org/10.3987/com-18-13916

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Synthesis of 2-anilinobenzimidates, anthranilamides, and 2,3-dihydroquinazolin-4(1H)-ones from N-heterocyclic carbenes of indazole

Autor: Martin Nieger, Zong Guan, Kai Hillrichs, Cemre Ünlü, Kari Rissanen, Andreas Schmidt

Publikováno v: Tetrahedron. 71(2):276

N-Heterocyclic carbenes of indazole (indazol-3-ylidenes), which are substituted at N1 with aromatics were generated in situ from the corresponding indazolium salts. At 60 °C the indazol-3-ylidenes underwent a ring-opening under N–N bond cleavage t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e47cdb68510b8af6e0959ca2374545ff
https://doi.org/10.1016/j.tet.2014.11.054

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