Results 271 to 280 of about 2,301,251 (349)

Facile synthesis of aryl and benzyl substituted 2-methylquinazolin-4(3H)-one ring by microfluidic flow reaction chemistry

Dongwook Wi, Jesus Campagna, Whitaker Cohn, Jessica Lee, Terran Cole, Barbara Jagodzinska, Varghese John   +6 more
openalex   +1 more source

Ring expansion of osmacyclopentadiene affords diverse six-membered osmaaromatics. [PDF]

Commun Chem
Zhao Y, Fu B, Li Y, Liu D, Bai W.
europepmc   +1 more source

DNA base pairs: the effect of the aromatic ring on the strength of the Watson-Crick hydrogen bonding.

Org Biomol Chem
Nieuwland C, van Well MJ, Guillaumes L, de Vey Mestdagh A, Dekker L, Nieuweboer C, Simon S, Fonseca Guerra C.   +7 more
europepmc   +1 more source

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Polynitrogen chemistry enters the ring

Science, 2017
A cyclo -N 5 − anion has been synthesized as a stable salt and characterized
K. Christe
openaire   +3 more sources

Small ring chemistry in crop protection

Tetrahedron, 2019
Abstract An overview is given of the significance of three- and four-membered rings in crop protection chemistry. The main herbicidally, fungicidally, and insecticidally active small ring derivatives are presented, together with their synthesis routes, modes of action and biological efficacies.
C. Lamberth
openaire   +2 more sources

Equilibria in Organo Antimony Ring Chemistry

Phosphorus, Sulfur, and Silicon and the Related Elements, 1992
Abstract Reactions of ethyl antimony and n-propyl antimony rings give equilibria with the mixed substituted derivatives R(n-m)R′mSbn (n = 4, m=1-3; n=5, m=1-4; R=Et, R′= n-Pr). The equilibrium constant K = [(EtSb)4]5/[(EtSb)5]4 has been determined as K = 9.10−8 mol/l. Air oxidation of p-TolSb(SiMeo3)2 gives yellow crystals of p-tolylantimony.
H. J. Breunig, S Gülec, R. Kaller
semanticscholar   +3 more sources

1-Azirine Ring Chemistry

HETEROCYCLES, 1977
Vasu Nair, Ki Hyup Kim
openaire   +2 more sources

Organofluorine chemistry: A Janus cyclohexane ring.

Nature chemistry, 2015
Nico, Santschi, Ryan, Gilmour
openaire   +3 more sources

Dearomative ring expansion of thiophenes by bicyclobutane insertion

Science, 2023
Skeletal ring enlargement is gaining renewed interest in synthetic chemistry and has recently focused on insertion of one or two atoms. Strategies for heterocyclic expansion through small-ring insertion remain elusive, although they would lead to the ...
Huamin Wang, Huiling Shao, Ankita Das, Subhabrata Dutta, Hok Tsun Chan, C. Daniliuc, K. Houk, F. Glorius   +7 more
semanticscholar   +1 more source

Bioisosteres of the Phenyl Ring: Recent Strategic Applications in Lead Optimization and Drug Design.

Journal of Medicinal Chemistry, 2021
The benzene moiety is the most prevalent ring system in marketed drugs, underscoring its historic popularity in drug design either as a pharmacophore or as a scaffold that projects pharmacophoric elements.
Murugaiah A. M. Subbaiah, N. Meanwell
semanticscholar   +1 more source