نتایج جستجو برای: bicyclic graph

تعداد نتایج: 199943  

2003
FRANZ LEMMERMEYER

In this note we present techniques to compute inhomogeneous minima of norm forms; as an application, we determine all norm-Euclidean complex bicyclic quartic number fields.

2014
Li Tan Kathlyn A. Parker Nicole S. Sampson

Strained bicyclic carbomethoxy olefins were utilized as substrates in alternating ring-opening metathesis polymerization and found to provide low-dispersity polymers with novel backbones. The polymerization of methyl bicyclo[4.2.0]oct-7-ene-7-carboxylate with cyclohexene in the presence of the fast-initiating Grubbs catalyst (H2IMes)(3-Br-Pyr)2Cl2Ru=CHPh leads to a completely linear as well as ...

Journal: :Chemical communications 2007
J Stephen Clark Carine Guérot Claire Wilson Alexander J Blake

Tandem carbenoid generation, ylide formation and [2,3]-rearrangement is a powerful method for the construction of bicyclic and linearly fused tricyclic systems containing a seven-membered ring.

2010
Lihua Feng

In this paper, we study the signless Laplacian spectral radius of bicyclic graphs with given number of pendant vertices and characterize the extremal graphs.

Journal: :Chemical communications 2014
D Christopher Braddock Dan-Tiberiu Sbircea

Bicyclic dibrominated C15 medium-ring ether hexahydrolaureoxanyne was produced directly from an acyclic model C15-epoxide when treated with NBS with water as the solvent.

Journal: :Chemical communications 2005
Osamu Hirata Masayuki Takeuchi Seiji Shinkai

A bicyclic host 1, which has a diethynyl tetrafluorophenyl axis and is expected to behave as an anion-binding 'turnstile', has been designed.

Journal: :Chemical communications 2005
Alan C Spivey Carles Giró Mañas Inderjit Mann

The single-step preparation of a polystyrene-bound N-methylthiourea and its use for the hydrogenolysis of bicyclic endoperoxides is described.

Journal: :Chemical communications 2008
Stefano Crotti Ferruccio Bertolini Franco Macchia Mauro Pineschi

The first successful asymmetric transfer of rhodium-alkynyl species to symmetrical strained alkenes has been realized starting from bicyclic hydrazines and alkynylboronic esters.

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1977
P B Chock E R Stadtman

Escherichia coli glutamine synthetase and glycogen phosphorylase are prototypes for models of "closed" and "opened" bicyclic cascade systems. Steady-state functions relating the fractional activation of interconvertible enzymes to the concentrations of allosteric effectors and to the catalytic constants of the several converter enzymes in such cascades were determined. The study shows that when...

Journal: :Organic & biomolecular chemistry 2010
Vijay Nair Sreekumar Vellalath Beneesh P Babu Vimal Varghese Rony Rajan Paul Eringathodi Suresh

Homoenolates generated from α,β-unsaturated aldehydes using NHC catalysis underwent facile addition to dibenzylidene cyclohexanone to afford bicyclic cyclopentenes as single diastereomers.

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