Zobrazeno 1 - 10
of 4 587
pro vyhledávání: '"Ring Expansion"'
Publikováno v:
Green Synthesis and Catalysis, Vol 5, Iss 4, Pp 310-314 (2024)
The Pictet-Spengler/transamination cascade reaction enables modular synthesis of marinoquinoline analogues through three-component indole ring-expansion/cyclization in the manner of novel N1–C2 cleavage of indoles. This metal-free protocol exhibits
Externí odkaz:
https://doaj.org/article/4d39d032ac694249a76316048ab742e5
Publikováno v:
Журнал органічної та фармацевтичної хімії, Vol 22, Iss 2, Pp 26-40 (2024)
The literature review discusses and systematizes synthetic approaches to medium-sized cycles and macrocycles based on ring expansion reactions of bi- or polycyclic systems via C-N bond cleavage. Ring expansion reactions of bicyclic ammonium salts pro
Externí odkaz:
https://doaj.org/article/bb49a54ab0124321902f0e9543760845
Publikováno v:
Tetrahedron Chem, Vol 12, Iss , Pp 100090- (2024)
The one-carbon ring expansion of benzocyclobutenones is an efficient methodology for the assembly of cyclic ketones. However, hazardous reagents or noble metal catalysts are frequently required. Herein, we disclose a copper-catalyzed intermolecular f
Externí odkaz:
https://doaj.org/article/f4c6a9204dec4ea49194f77bdb5c0223
Publikováno v:
Molecules, Vol 29, Iss 22, p 5392 (2024)
Cyclic polymers have many interesting properties compared to their linear analogs, but there are very few examples of their synthesis. This is because most cyclic polymers have been synthesized by stepwise processes, including synthesizing homo- or h
Externí odkaz:
https://doaj.org/article/9d38e71571a943d9804977f34a0b09cd
Akademický článek
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Akademický článek
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Autor:
Dmitry B. Vinogradov, Alexei N. Izmest’ev, Angelina N. Kravchenko, Yuri A. Strelenko, Galina A. Gazieva
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 19, Iss 1, Pp 1047-1054 (2023)
A series of imidazo[4,5-e][1,3]thiazino[2,3-c][1,2,4]triazines was synthesized via a cascade sequence of hydrolysis and skeletal rearrangement of imidazo[4,5-e]thiazolo[2,3-c][1,2,4]triazin-7(8H)-ylidene)acetic acid esters in methanol upon treatment
Externí odkaz:
https://doaj.org/article/4e9be18173614dfd810165ebaecbd997
Publikováno v:
Advanced Science, Vol 11, Iss 10, Pp n/a-n/a (2024)
Abstract The nitrogen‐heteroatom single bonds of 1,2‐azoles and isoxazolines underwent methylene insertion in the presence of CH2I2 (6 equiv.) and diethylzinc (3 equiv.) to produce a wide variety of the ring‐expanded six‐membered heterocycles
Externí odkaz:
https://doaj.org/article/2f885d1f24e9491ea358a2cea8343126
Autor:
Xue Li, Zhigang Xu
Publikováno v:
Molecules, Vol 29, Iss 9, p 1920 (2024)
Skeleton editing has rapidly advanced as a synthetic methodology in recent years, significantly streamlining the synthesis process and gaining widespread acceptance in drug synthesis and development. This field encompasses diverse ring reactions, man
Externí odkaz:
https://doaj.org/article/78a021248ef54f0f91b5cd5a4eee0add
Publikováno v:
Molecules, Vol 29, Iss 8, p 1839 (2024)
Polymers with cyclic topology have no terminal structure and, therefore, exhibit various unique physical and functional properties compared to those of linear analogs. In this paper, we report an innovative methodology for the synthesis of cyclic pol
Externí odkaz:
https://doaj.org/article/55c4c8b672b544309c2f09ec7f149dc2